Robert Bruce Hayes

Also known as: Rob Hayes

retrospective dosimetry, nuclear criticality, ALARA, radiological air monitoring, nuclear emergency response, consequence assessment, electron paramagnetic resonance, luminescence dosimetry

Works (115)

Updated: April 22nd, 2024 07:44

2024 journal article

A preliminary NASA compliant conformal coating for optimized space radiation shielding configurations and its mass attenuation coefficients

PROGRESS IN NUCLEAR ENERGY, 169.

By: S. Hanson n, Y. Xiao*, R. Charrette n & R. Hayes n

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: April 1, 2024

2024 article

Demonstrating a Quantitative and Systematic Approach to Reducing Excess Conservativism in Nuclear Criticality Safety Analyses

Holyk, S. A., & Hayes, R. B. (2024, April 8). NUCLEAR SCIENCE AND ENGINEERING, Vol. 4.

By: S. Holyk n & R. Hayes n

author keywords: Nuclear criticality safety; excess conservatism; Safety Analysis Report; TRUPACT-II
Sources: ORCID, Web Of Science, NC State University Libraries
Added: April 15, 2024

2023 journal article

A thermal natural uranium breeder reactor for large and small applications with passive safeguard designs

PROGRESS IN NUCLEAR ENERGY, 163.

By: R. Hayes n & M. Sawyers n

UN Sustainable Development Goal Categories
Sources: ORCID, Web Of Science, NC State University Libraries
Added: July 2, 2023

2023 journal article

An Assessment of Heterogeneous Effects on System Reactivity for Criticality Safety Analyses with LEU+ and HALEU Materials

Nuclear Technology, 209(6), 835–856.

By: P. Sewell n & R. Hayes n

author keywords: LEU plus; HALEU; heterogeneous; SCALE; transportation
UN Sustainable Development Goal Categories
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: February 16, 2023

2023 journal article

Dose Estimation for Extravasation of 177Lu, 99mTc, and 18F

Health Physics, 124(3), 217–220.

By: I. Tsorxe n & R. Hayes n

author keywords: dose; absorbed; dosimetry; internal; Monte Carlo; radiation risk
MeSH headings : Radiation Dosage; Radiopharmaceuticals; Radioisotopes; Radiometry / methods
TL;DR: To understand whether a radiopharmaceutical extravasation could exceed the US Nuclear Regulatory Commission’s medical event reporting limit of 0.5 Sv dose equivalent to tissue or levels at which tissue damage would be anticipated, the GATE Monte Carlo simulation software was used to calculate self-dose to spherical volumes containing uniformly distributed amounts of common radiophARMaceutical isotopes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: February 27, 2023

2023 journal article

EVALUATION OF EXISTING PUBLIC DOSE LIMITS APPLIED TO RECREATIONAL SPACEFLIGHT

Radiation Protection Dosimetry, 199(5), 482–489.

By: M. Long n & R. Hayes n

MeSH headings : Humans; Space Flight; Astronauts
TL;DR: The necessity to come to a collective decision on dose limits and radiation safety procedures for recreational spaceflight is urgent and imperative to maintain ALARA goals, as existing federal dose limits to the public cannot be adequately or universally applied to the space tourism sector. (via Semantic Scholar)
UN Sustainable Development Goal Categories
8. Decent Work and Economic Growth (OpenAlex)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: February 21, 2023

2023 journal article

Nuclear waste Educator's workshop: What and how do we teach about nuclear waste?

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 270.

By: H. Wainwright*, B. Powell*, M. Hoover*, A. Ayoub*, M. Atz*, C. Benson*, R. Borrelli*, D. Djokic* ...

author keywords: Nuclear waste management and disposal; Interdisciplinary research and education
Sources: Web Of Science, NC State University Libraries
Added: October 23, 2023

2022 journal article

A Novel Approach for Detection of Illicit Nuclear Activities Using Optically Stimulated Dosimetry

ESARDA Bulletin - The International Journal of Nuclear Safeguards and Non-Proliferation, 64(1), 64–74.

By: E. Aras & R. Hayes

Source: NC State University Libraries
Added: July 22, 2023

2022 journal article

A Standard Model Approach to Inflation

Journal of Modern Physics, 13(02), 113–121.

By: R. Hayes n

UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Sources: Crossref, NC State University Libraries
Added: July 4, 2023

2022 journal article

A systems approach to a resilience assessment for agility

Systems Science & Control Engineering, 10(1), 955–964.

By: R. Hayes n

author keywords: Analysis; artificial intelligence; energy and power systems; machine learning; systems
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: December 17, 2022

2022 journal article

EPR Investigation of Temporal and Thermal Stability of Irradiated Sweeteners

HEALTH PHYSICS, 123(6), 476–485.

By: F. Abdelrahman n & R. Hayes n

author keywords: dosimetry; gamma; dose assessment; gamma radiation; radiation dose
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: November 21, 2022

2022 journal article

Harnessing the Environment to Identify Nuclear Processes: Biologically-Mediated Approaches

Countering WMD Journal, 24, 60–85.

By: H. Meeks, T. Steen, W. McKendee, R. Otis, H. Cui, R. Volpe, R. Hayes, R. Agans, A. Lewis

Source: NC State University Libraries
Added: July 22, 2023

2022 journal article

Harnessing the Environment to Identify Nuclear Processes: I. Biological Markers to Assess Environmental Exposure

Countering WMD Journal, 24, 93–119.

By: H. Meeks, R. Oates, H. Cui, G. Hwang, R. Volpe, R. Hayes, T. Steen, R. Agans ...

Source: NC State University Libraries
Added: July 22, 2023

2022 journal article

Neutron activation analysis of novel space shielding for terrestrial applications

NUCLEAR ENGINEERING AND DESIGN, 398.

By: M. Long n & R. Hayes n

author keywords: Metal oxide; Conformal coating; Activation analysis; Radiological waste; Nuclear waste; Waste disposal
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: October 31, 2022

2022 journal article

Nuclear energy myths versus facts support it's expanded use - a review

Cleaner Energy Systems, 2, 100009.

By: R. Hayes n

Source: ORCID
Added: June 12, 2022

2022 journal article

The ubiquity of nuclear fission reactors throughout time and space

PHYSICS AND CHEMISTRY OF THE EARTH, 125.

By: R. Hayes n

Sources: ORCID, Web Of Science, NC State University Libraries
Added: November 18, 2021

2022 journal article

Thermoluminescence and optically stimulated luminescence response of Al2O3 coatings deposited by mist-chemical vapor deposition

Radiation Physics and Chemistry, 191, 109860.

By: B. Kanies n, R. Hayes n & G. Yang

author keywords: Thermoluminescence; Optically stimulated luminescence; Mist-chemical vapor deposition; Retrospective dosimetry; Aluminum oxide
UN Sustainable Development Goal Categories
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: October 30, 2021

2021 journal article

A Standard Model Neutrino Mechanism

Journal of Modern Physics, 12(11), 1475–1482.

By: R. Hayes n

Sources: Crossref, NC State University Libraries
Added: June 19, 2023

2021 journal article

An effectively nondestructive method for dose assessment from accidental exposure using PCBs from electronic watches

RADIATION MEASUREMENTS, 148.

By: M. Tchouaso n, N. Coon n & R. Hayes n

author keywords: Nondestructive method; Absorbed dose; Emergency response; Alanine dosimeter; Luminescence dosimeter
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: October 12, 2021

2020 journal article

A Novel Approach to Realistic Conservatism in Nuclear Criticality Safety Analysis

Nuclear Technology, 207(3), 460–467.

By: R. Hayes n

author keywords: Nuclear criticality safety; probabilistic safety analysis; regulatory compliance; qualitative risk assessment
TL;DR: This technical note discusses various options for approaching a defendable realistic technical basis for safety analysis by associating probabilities with conservative assumptions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 10, 2020

2020 journal article

Ionizing Radiation Shielding Properties of Metal Oxide Impregnated Conformal Coatings

Radiation Physics and Chemistry, 171, 108685.

By: M. DeVanzo* & R. Hayes n

author keywords: Metal oxide; Conformal coating; Radiation shielding; Mass percent; Particulate size
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 27, 2020

2020 journal article

Low level EPR dosimetry of a commercial sugar

Applied Radiation and Isotopes, 157, 109038.

By: R. Hayes n & F. Abdelrahman n

author keywords: Electron paramagnetic resonance; Dosimetry; Sugar; Radiological emergency response; Nuclear forensics; EPR
TL;DR: This work demonstrated the combined utility of empty tube subtraction, over-modulation, native signal subtraction and spectral filtration in low level dosimetry using commercial sugar samples. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: March 30, 2020

2020 journal article

Opportunities for a graded approach in air sample assay and triage

ESARDA Bulletin, 60, 43–52.

By: R. Hayes & S. Cope

Source: NC State University Libraries
Added: July 22, 2023

2020 journal article

Retrospective characterization of special nuclear material in time and space

Radiation Measurements, 133, 106301.

By: R. Hayes n & R. O'Mara n

author keywords: Nuclear nonproliferation; Optically stimulated luminescent dosimeter; Retrospective imaging; Gamma camera; Nuclear safeguards
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: March 14, 2020

2020 journal article

Three-dimensional positional analysis of weapons grade plutonium using gridded arrays of dosimeters

ESARDA Bulletin, 61.

By: R. O’Mara & R. Hayes

Source: NC State University Libraries
Added: July 22, 2023

2020 magazine article

Unaccounted for uncertainties in radioaerosol assays as used in plume reconstruction or treaty verification

Hayes, R. B. (2020, June). ESARDA Bulletin, 60, 53–59.

By: R. Hayes

Source: NC State University Libraries
Added: August 1, 2023

2019 journal article

Incremental Gains in Transuranic Activity Analysis in Air Samples for Radiological Emergency Response

Nuclear Technology, 205(9), 1219–1235.

By: S. Cope n & R. Hayes n

author keywords: Air sampling; emergency response; transuranic activity; radon progeny discrimination
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: September 9, 2019

2019 journal article

Initial TL/OSL/EPR Considerations for commercial diatomaceous earth in retrospective dosimetry and dating

Radiation Protection Dosimetry, 1-10.

By: R. Hayes n, R. O’Mara n & D. Hooper*

MeSH headings : Diatomaceous Earth / analysis; Diatomaceous Earth / radiation effects; Electron Spin Resonance Spectroscopy / instrumentation; Electron Spin Resonance Spectroscopy / methods; Materials Testing / methods; Radiation Dosage; Retrospective Studies; Thermoluminescent Dosimetry / instrumentation; Thermoluminescent Dosimetry / methods
TL;DR: The thermoluminescence (TL) and optically stimulated luminescence properties of commercially obtained diatomaceous earth was investigated and suggested some mechanisms explaining the sensitization process in geological silicate materials utilized in dosimetry and dating. (via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: November 15, 2019

2019 magazine article

Nuclear forensics via the electronic properties of particulate and samples

Hayes, R. B., O'Mara, R. P., & Abdelrahman, F. (2019, December). ESARDA Bulletin, 59, 21–28.

By: R. Hayes, R. O'Mara & F. Abdelrahman

Source: NC State University Libraries
Added: August 1, 2023

2019 conference paper

Opportunities for a graded approach in air sample assay and triage

41st ESARDA Annual Meeting symposium on safeguards and nuclear material management. Presented at the 41st ESARDA Annual Meeting, Stressa, Italy.

By: R. Hayes, R. O’Mara & F. Abdelrahman

Event: 41st ESARDA Annual Meeting at Stressa, Italy on May 14-16, 2019

Sources: NC State University Libraries, NC State University Libraries
Added: December 16, 2019

2019 journal article

Retrospective dosimetry at the natural background level with commercial surface mount resistors

Radiation Measurements, 121, 42–48.

By: R. Hayes n & R. O'Mara n

author keywords: Thermoluminescence; Emergency response; Dosimetry; Personnel monitoring
TL;DR: A single aliquot regenerative (SAR) protocol utilizing thermoluminescence demonstrated precise and accurate retrospective dosimetry capability using common commercial surface mount resistors at levels able to discriminate the age of resistors based on background dose accrual. (via Semantic Scholar)
UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: February 25, 2019

2019 journal article

Retrospective uranium enrichment potential using solid state dosimetry techniques on ubiquitous building materials

Journal of Nuclear Material Management, 47(2), 4–12.

By: R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2019 journal article

Validation of a rapid, conservative transuranic alpha activity estimation method in air samples

Journal of Radiological Protection, 39(3), 749–765.

By: S. Cope n & R. Hayes n

Contributors: S. Cope n & R. Hayes n

author keywords: air monitoring; radon progeny; radiological emergency response; alpha particles
MeSH headings : Air Pollutants, Radioactive / analysis; Filtration / instrumentation; North Carolina; Plutonium / analysis; Radiation Monitoring / methods; Radon Daughters / analysis; Uranium / analysis
TL;DR: Validation of this method to produce rapid, conservative and defensible transuranic alpha activity estimates was accomplished through introduction of surrogate transuric activity, 239Pu and 230Th check sources, along with the naturally occurring radioactive progeny from an environmental air filter. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: July 15, 2019

2018 standard

American National Standard Instrumentation and Systems for Monitoring Airborne Radioactivity

By: N. Libraries

Sources: Crossref, NC State University Libraries
Added: November 16, 2019

2018 journal article

Dose Deposition Profiles in Untreated Brick Material

HEALTH PHYSICS, 114(4), 414–420.

By: R. O'Mara n & R. Hayes n

author keywords: accident analysis; accidents; nuclear; dosimetry; dosimetry; thermoluminescent
MeSH headings : Construction Materials / analysis; Radiation Dosage; Radioactive Hazard Release; Retrospective Studies; Thermoluminescent Dosimetry / methods
TL;DR: It was found that by using thermoluminescence responses, the dose deposition profile of a brick sample could be reconstructed without any chemical treatment, and has the potential to greatly expedite dose reconstructions in the wake of nuclear accidents. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 conference paper

Grain size and density separation effects on luminescence dose estimates using brick material

Embedded Topical Meeting - Advances in Nuclear Nonproliferation Technology and Policy Conference 2018, ANTPC 2018, 192–195. http://www.scopus.com/inward/record.url?eid=2-s2.0-85067121319&partnerID=MN8TOARS

By: R. O’Mara & R. Hayes

Contributors: . R.P. O'Mara & R. Hayes

Source: ORCID
Added: November 15, 2019

2018 personal communication

LNT May Be Lethal but ALARA Is Inherently Useful

Hayes, R. B. (2018, September).

By: R. Hayes*

MeSH headings : Humans; Radiation, Ionizing
TL;DR: The authors pointed out the dangers from radiophobia but did not elucidate how this is such a drastic departure from their recognition of no medical effects being observed at low and nominal doses as there are clearly acutely severe psychosocial and psychosomatic effects. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: November 7, 2018

2018 journal article

Preliminary work toward a transuranic activity estimation method for rapid discrimination of anthropogenic from TRU in alpha air samples

Health Physics (New York, N.Y.), 114(4), 319–327.

By: S. Cope & R. Hayes

Source: NC State University Libraries
Added: August 6, 2018

2018 journal article

Total Ambient Dose Equivalent Buildup Factors for Portland Concrete

HEALTH PHYSICS, 115(3), 324–337.

By: P. Duckic* & R. Hayes n

Contributors: P. Duckic* & R. Hayes n

author keywords: algorithm; Monte Carlo; neutron dosimetry; shielding
MeSH headings : Construction Materials; Gamma Rays; Machine Learning; Monte Carlo Method; Neutrons; Radiation Dosage; Radiation Protection; Software
TL;DR: The credible dispersion in expected resultant buildup factors was also calculated by conducting a very rudimentary sensitivity analysis, varying the water content in the first case and then varying the amount of aggregate, to provide a model based on the machine-learning technique called the support vector regression method in the calculation of concrete buildup factors. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: October 19, 2018

2018 journal article

Total ambient dose equivalent buildup factor determination for NBS04 concrete

Health Physics, 114(6), 569–581.

By: P. Duckic n & R. Hayes n

Contributors: P. Duckic n & R. Hayes n

author keywords: algorithm; Monte Carlo; neutron dosimetry; shielding
MeSH headings : Air Pollutants, Radioactive / analysis; Construction Materials / analysis; Gamma Rays; Monte Carlo Method; Neutrons; Radiation Dosage; Radiation Protection / methods
TL;DR: Support vector regression, a machine learning technique, has been engaged to make a model based on the calculated data for calculation of the buildup factors, which can predict most of the data with 20% relative error. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2017 journal article

A standard model approach to dark energy and inflation

Journal of Cosmology, 26, 14850–14859. http://journalofcosmology.com/JOC26/Hayes.pdf

By: R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2017 chapter

Applications of Radioisotopes

In Encyclopedia of Sustainability Science and Technology.

By: R. Hayes n

Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2017 article

RECONSTRUCTION OFA RADIOLOGICAL RELEASE USING AEROSOL SAMPLING

Hayes, R. B. (2017, April). HEALTH PHYSICS, Vol. 112, pp. 326–337.

By: R. Hayes n

author keywords: accident analysis; accidents; nuclear; accidents; power reactor; air sampling
MeSH headings : Aerosols / analysis; Air Pollutants, Radioactive / analysis; Computer Simulation; Models, Statistical; New Mexico; Particle Size; Radiation Dosage; Radiation Monitoring / methods; Radioactive Hazard Release / statistics & numerical data; Radioactive Waste / statistics & numerical data; Radioisotopes / analysis; Reproducibility of Results; Sample Size; Sensitivity and Specificity
TL;DR: It is shown here that the limiting factor in detection is not counting statistics of the activity but rather the statistics for aerosols having small sample population numbers due to the lognormal distribution of particle radii. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

RETROSPECTIVE IMAGING AND CHARACTERIZATION OF NUCLEAR MATERIAL

HEALTH PHYSICS, 113(2), 91–101.

By: R. Hayes n & S. Sholom*

author keywords: detector; thermoluminescent; dose; dosimetry; gamma; thermoluminescence dosimetry
MeSH headings : Luminescent Measurements / methods; Magnetic Resonance Imaging / methods; Molecular Imaging / methods; Radiation Dosage; Radiation Protection / methods; Radioisotopes / analysis; Radiometry / methods; Reproducibility of Results; Retrospective Studies; Sensitivity and Specificity; Technology Assessment, Biomedical
TL;DR: The current work and results show how to characterize nuclear materials after they have been removed from an area leaving no chemical trace, and a new approach is demonstrated to be fully capable of providing both previous source spatial distribution and emission energy grouping. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Some Mathematical and Geophysical Considerations in Radioisotope Dating Applications

NUCLEAR TECHNOLOGY, 197(2), 209–218.

By: R. Hayes n

author keywords: Isotopic mass diffusion; isochron; radioisotopic dating
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2016 journal article

CONSEQUENCE ASSESSMENT OF THE WIPP RADIOLOGICAL RELEASE FROM FEBRUARY 2014

HEALTH PHYSICS, 110(4), 342–360.

By: R. Hayes n

author keywords: accident analysis; accidents; nuclear; air sampling; dose assessment
MeSH headings : Atmosphere / chemistry; Environmental Monitoring; Humans; New Mexico; Radiation Dosage; Radiation Monitoring; Radioactive Hazard Release; Radioactive Waste; Radioisotopes / analysis; United States; Weather
TL;DR: Using modeling based on measured effluent activity, onsite dose estimates were calculated and later measured to be less than 0,1 mSv from intakes of radioactivity, which was consistent with air samples being taken at those dwellings during the release. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2016 journal article

Contributions of Various Radiological Sources to Background in a Suburban Environment

HEALTH PHYSICS, 111(5), S193–S199.

By: R. Milvenan n & R. Hayes n

Contributors: R. Milvenan n & R. Hayes n

author keywords: operational topics; dose assessment; environmental assessment; radiation; background
TL;DR: The relative contributions from natural radioactivity such as potassium in foods and common household items are shown to be easily distinguished from background using standard handheld instrumentation when applied in a systematic, methodological manner. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

IMPLEMENTATION OF A PORTABLE HPGE FOR FIELD CONTAMINATION ASSAY

HEALTH PHYSICS, 110(6), 571–579.

By: R. Hayes n

author keywords: Am-241; accidents; nuclear; contamination; waste disposal
MeSH headings : Air Pollutants, Radioactive / analysis; Air Pollution, Indoor / analysis; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Germanium / radiation effects; Radiation Monitoring / instrumentation; Radioactive Pollutants / analysis; Reproducibility of Results; Sensitivity and Specificity
TL;DR: Results indicate that contamination levels of activity in the exhaust shaft at the Waste Isolation Pilot Plant can be assayed to within a factor of 2.5, which would constitute a legal environmental release if unfiltered ventilation of the underground facility were used. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2015 journal article

Operational Check Source Recalibration

Health Physics, 109, S156–S161.

By: R. Hayes*

MeSH headings : Algorithms; Calibration / standards; Internationality; Radiation Dosage; Radioisotopes / analysis; Radioisotopes / standards; Radiometry / methods; Radiometry / standards; Reference Values; Sensitivity and Specificity; Specimen Handling / standards
TL;DR: A formal protocol whereby a segregated source is used for later quality control trending and recalibration of operational sources is described, which is of potential use for any quality radioactive assay program where multiple sources may be in use such that long term loss in activity is possible. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2014 journal article

Using Isotopic Ratios for Discrimination of Environmental Anthropogenic Radioactivity

Health Physics, 107(4), 277–291.

By: R. Hayes* & M. Akbarzadeh

author keywords: aerosols; air sampling; modeling; environmental; waste management
MeSH headings : Air Pollutants, Radioactive / analysis; Environmental Monitoring / methods; Mining; Plutonium / analysis; Radioactive Waste; Soil Pollutants, Radioactive / analysis
TL;DR: By characterizing both the credible range of 137Cs/239,240Pu ratios from the environment and those known to exist in the waste, a rigorous test criteria is attained and a gross assay of total TRU radioactivity pulled into the mine over time from global fallout is carried out. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2013 journal article

Nuclear criticality as a contributor to gamma ray burst events

Astrophys Space Sci, 345(1), 147–154.

By: R. Hayes*

Contributors: R. Hayes*

author keywords: Gamma ray bursts; Nuclear criticality; Energy spectrum
Source: ORCID
Added: November 15, 2019

2013 book

Nuclear science and technology made so simple, it belongs in your newspaper – popular science topics for the layman

https://www.amazon.com/Nuclear-Science-Technology-belongs-newspaper-ebook/dp/B00CC2KB5S

By: R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2011 journal article

Special issue on the 16th biennial topical meeting of the radiation protection and shielding division

Nuclear Technology, 175(1), 1.

By: R. Hayes*

Contributors: R. Hayes*

Source: ORCID
Added: November 15, 2019

2010 article

Emergency Situation Air Sampling

Hayes, R. (2010, October). Radioactive Air Sampling Methods, pp. 357–367.

By: R. Hayes

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: ORCID
Added: November 15, 2019

2010 book reference

Radioactive Air Sampling Methods

Robert Hayes

Ed(s): M. Maiello & M. Hoover

Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2009 journal article

Continuous Air Monitor Algorithm Development

Nuclear Technology, 168(1), 35–40.

By: R. Hayes*

author keywords: airborne contamination; continuous air monitor; algorithm
TL;DR: An algorithm intended for use in the U.S. Navy’s next-generation air particle detector designed for measuring 60Co air contamination is described, demonstrating that the beta assay value is a linear superposition of the alpha ROI values from the three dominant alpha peaks. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2009 journal article

Preliminary Benchmarking Efforts and MCNP Simulation Results for Homeland Security

Nuclear Technology, 168(3), 852–857.

By: R. Hayes*

author keywords: detector; benchmark; MCNP
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2008 journal article

High burn-up capability possibilities for a new beryllium moderated water cooled natural uranium reactor

Annals of Nuclear Energy, 35(8), 1584–1586.

By: R. Hayes*

Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2008 journal article

PROBLEMS FOUND USING A RADON STRIPPING ALGORITHM FOR RETROSPECTIVE ASSESSMENT OF AIR FILTER SAMPLES

Health Physics, 94(4), 366–372.

By: R. Hayes*

author keywords: operational topics; air monitoring; radon; alpha particles
MeSH headings : Air Pollutants, Radioactive / analysis; Algorithms; Filtration / methods; Radiation Monitoring / instrumentation; Radiation Monitoring / methods; Radon / analysis; Software
TL;DR: An evaluation of a large number of air sample filters was undertaken using a commercial alpha and beta spectroscopy system employing a passive implanted planar silicon (PIPS) detector, showing that there was a time-dependent bias in both average estimates and measurement dispersion of anthropogenic activity estimates. (via Semantic Scholar)
UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Source: ORCID
Added: November 15, 2019

2007 journal article

BiodosEPR-2006 Meeting: Acute dosimetry consensus committee recommendations on biodosimetry applications in events involving uses of radiation by terrorists and radiation accidents

Radiation Measurements, 42(6-7), 972–996.

By: G. Alexander*, H. Swartz*, S. Amundson*, W. Blakely, B. Buddemeier*, B. Gallez*, N. Dainiak*, R. Goans ...

author keywords: acute dosimetry; radiological triage; dose assessment; electron paramagnetic resonance; cytogenetic biodosimetry; medical management of radiation casualties
TL;DR: In the aftermath of a radiological terrorism incident or mass-casualty radiation accident, first responders and receivers require prior guidance and pre-positioned resources for assessment, triage and medical management of affected individuals. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2007 journal article

Burn-up characteristics of a light-water-cooled nuclear reactor of natural uranium and beryllium

Journal of Physical & Natural Science, 1(2), 1–11.

By: R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2007 journal article

Electron spin relaxation of radicals in irradiated tooth enamel and synthetic hydroxyapatite

Radiation Measurements, 42(6-7), 997–1004.

By: H. Sato, B. Filas, S. Eaton, G. Eaton, A. Romanyukha, R. Hayes*, A. Rossi

Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2006 journal article

A Light-Water-Cooled Nuclear Reactor of Natural Uranium and Beryllium

Journal of ASTM International, 3(8), 100274.

By: S. Dean & R. Hayes*

Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2005 journal article

Collimated spectroscopy for specific activity determination behind a shield wall

Radiation Measurements, 39(1), 43–46.

By: R. Hayes*

author keywords: gamma spectroscopy; collimation
Source: ORCID
Added: November 15, 2019

2005 journal article

USE OF ALPHA SPECTROSCOPY FOR CONDUCTING RAPID SURVEYS OF TRANSURANIC ACTIVITY ON AIR SAMPLE FILTERS AND SMEARS

Health Physics, 89(2), 172–180.

By: R. Hayes*, A. Pe??a & T. Goff

author keywords: air sampling; plutonium; spectroscopy; alpha; radon progeny
MeSH headings : Air Pollutants, Radioactive / analysis; Algorithms; Alpha Particles; Radiation Dosage; Radiation Monitoring / instrumentation; Radiation Monitoring / methods; Radiation Protection / instrumentation; Radiation Protection / methods; Risk Assessment / methods; Ultrafiltration / instrumentation; Ultrafiltration / methods; Uranium / analysis
TL;DR: The utility of a portable alpha Continuous Air Monitor as a bench top scalar counter for multiple sample types, including using the CAM to count fixed air sample filters and radiological smears is demonstrated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2005 journal article

Variation of long-lived free radicals responsible for the EPR native signal in bone of aged or diseased human females and ovariectomized adult rats

Radiation Measurements, 39(3), 255–262.

By: G. Kenner*, A. Brik, G. Liu*, E. Haskell*, R. Hayes*, J. Knight*, E. Vajda*, S. Miller*, W. Jee*, J. Barrus*

author keywords: dosimetry; aging; osteoporosis; free radicals; EPR; iron
MeSH headings : Adolescent; Adult; Aged; Aging / physiology; Animals; Antioxidants; Bone and Bones / physiopathology; Electron Spin Resonance Spectroscopy; Female; Femur; Flavonoids; Free Radicals / analysis; Humans; Iron; Ligands; Middle Aged; Osteoporosis / physiopathology; Ovariectomy; Radiometry; Rats; Rats, Sprague-Dawley; Women
TL;DR: It was determined that changes occur in the long-lived free radicals responsible for the native signal of cortical bone in aging or diseased human females and aged ovariectomized rats, and dramatic decreases in both NC and BC signals were seen in HIV positive and uncontrolled diabetic patients. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: ORCID
Added: November 15, 2019

2004 journal article

A NEW TECHNIQUE FOR PRELIMINARY ESTIMATES OF TRU ACTIVITY ON AIR SAMPLE FILTERS AND RADIOLOGICAL SMEARS

Health Physics, 87(4), 429–436.

By: R. Hayes*

author keywords: air sampling; spectrometry; alpha; naturally occurring radionuclides; waste management
MeSH headings : Air Pollutants, Radioactive; Air Pollution, Radioactive; Algorithms; Environmental Monitoring / methods; Filtration; Radiation Monitoring / methods; Radioactive Waste; Radon Daughters; Spectrophotometry
TL;DR: The utility of using a portable continuous air monitor as an alpha spectrometer to make transuranic activity determinations of samples is evaluated using both the built in algorithm for air monitoring and a simple region of interest analysis. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2004 journal article

CURVE FITTING AIR SAMPLE FILTER DECAY CURVES TO ESTIMATE TRANSURANIC CONTENT

Health Physics, 86(1), 80–91.

By: R. Hayes* & H. Chiou

author keywords: air sampling; monitoring; air; computer calculations; ventilation
MeSH headings : Air Pollutants, Radioactive / analysis; Algorithms; Environmental Monitoring / methods; Filtration / instrumentation; Filtration / methods; Half-Life; Models, Statistical; Poisson Distribution; Radiation Dosage; Radioisotopes / analysis; Radiometry / instrumentation; Radiometry / methods; Reproducibility of Results; Risk Assessment / methods; Sensitivity and Specificity; Uranium / analysis
TL;DR: A new technique is developed to evaluate transuranic activity on air filters by curve fitting the decay curves by using the use of filter activity measurements at different times to estimate the air concentrations of radon progeny. (via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure (OpenAlex)
Source: ORCID
Added: November 15, 2019

2004 journal article

Creating a baseline radiological standard for the waste isolation pilot plant underground

Isotopes in Environmental and Health Studies, 40(3), 213–220.

By: H. Chiou* & R. Hayes*

author keywords: background radiation; radiation protection; radiological standard; salt mine; transuranic waste; waste disposal
MeSH headings : Beta Particles; Gamma Rays; Geological Phenomena; Geology; Radiation Dosage; Radiation Protection; Radioactive Waste / legislation & jurisprudence; Radiometry; Refuse Disposal / legislation & jurisprudence; Refuse Disposal / standards; United States; Waste Management / legislation & jurisprudence; Waste Management / standards
TL;DR: The establishment of the baseline information using the gamma background dose rate measurements and the salt rib smears of surface removable alpha and beta activities throughout the WIPP underground will be beneficial to the overall WIPP operational facility, ensuring the worker safety and adding to public confidence in the operation of the Wipps. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2004 journal article

Generalized photon skyshine calculations

Radiation Protection Dosimetry, 111(3), 251–256.

By: R. Hayes*

MeSH headings : Algorithms; Body Burden; Humans; Photons; Radiation Dosage; Radiation Monitoring / methods; Radiation Protection / methods; Relative Biological Effectiveness; Reproducibility of Results; Sensitivity and Specificity; Sunlight; Ultraviolet Rays
TL;DR: The energy-dependent dose contributions from monoenergetic photon source points located 1.5 m above the ground have been tabulated and are presented in effective dose units for regulatory compliance with site boundary dose limitations. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: November 6, 2020

2003 conference paper

Alternate Approach to the Upper Subcritical Limit Determination for MCNP

Transactions of the American Nuclear Society, 89, 109. http://www.scopus.com/inward/record.url?eid=2-s2.0-0346904404&partnerID=MN8TOARS

By: W. Rhoden & R. Hayes

Contributors: W. Rhoden & R. Hayes

Source: ORCID
Added: November 15, 2019

2003 conference paper

Collimated Spectroscopy for Specific Activity Determination Behind a Shield Wall

Transactions of the American Nuclear Society, 89, 566. http://www.scopus.com/inward/record.url?eid=2-s2.0-0346904210&partnerID=MN8TOARS

By: R. Hayes & A. Strait

Contributors: R. Hayes & A. Strait

Source: ORCID
Added: November 15, 2019

2003 journal article

Diagnostic X ray dose profiles in molar teeth using Monte Carlo simulation

Radiation Protection Dosimetry, 104(2), 153–158.

By: R. Hayes*

MeSH headings : Body Burden; Dentin / physiology; Humans; Models, Biological; Models, Statistical; Molar / physiology; Monte Carlo Method; Radiation Dosage; Radiation Protection / methods; Radiography; Radiometry / methods; Reproducibility of Results; Sensitivity and Specificity; X-Rays
TL;DR: The dose profiles in molar teeth from diagnostic X rays was calculated using the Monte Carlo software program MCNP4c2 and supports needs in EPR retrospective dosimetry to account for diagnostic X ray exposures in teeth. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: November 17, 2019

2003 journal article

False CAM Alarms from Radon Fluctuations

Health Physics, 85, S81–S84.

By: R. Hayes*

MeSH headings : Air Pollution, Radioactive / analysis; Algorithms; Alpha Particles; Artifacts; Background Radiation; Beta Particles; Equipment Failure; Equipment Failure Analysis / methods; Occupational Exposure / analysis; Radiation Dosage; Radiation Protection / instrumentation; Radiation Protection / methods; Radioactive Waste / analysis; Radiometry / instrumentation; Radiometry / methods; Radon / analysis; Reproducibility of Results; Sensitivity and Specificity
TL;DR: The root cause of many false continuous air monitor (CAM) alarms is revealed for CAMs that use constant spectral shape assumptions in transuranic (TRU) alpha activity determination algorithms. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2003 journal article

Preliminary Evaluation of Real Time False CAM Alarm Prediction Through Continuous Radon Monitoring

Health Physics, 84, S89–S92.

By: R. Hayes* & H. Chiou

author keywords: operational topic; monitors; radiation; radon; spectroscopy; alpha
MeSH headings : Air Pollutants, Radioactive / analysis; Radiation Monitoring / instrumentation; Radon / analysis
TL;DR: From the results obtained, it appears that the radon monitor will be able to indicate when large rapid changes in radon levels are occurring before the effect on a CAM has taken place. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2002 journal article

AN EPR MODEL FOR SEPARATING INTERNAL 90SR DOSES FROM EXTERNAL GAMMA-RAY DOSES IN TEETH

Health Physics, 83(1), 75–81.

By: R. Hayes*, E. Haskell & G. Kenner

author keywords: biological indicators; Sr-90; gamma radiation; dose; internal
MeSH headings : Electron Spin Resonance Spectroscopy / methods; Gamma Rays; Humans; Middle Aged; Models, Theoretical; Reproducibility of Results; Strontium / pharmacokinetics; Tooth / radiation effects
TL;DR: A simplified theoretical model is presented by which the internal exposure from a bone seeking radionuclide can be measured and distinguished from an external gamma-ray dose. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2002 journal article

Alpha CAM alarm set points in a salt dust environment

Health Physics, 82(6), 887–897.

By: R. Hayes* & M. Beekman

Contributors: R. Hayes* & M. Beekman

author keywords: waste disposal; regulations; monitoring, air; radiation monitors
MeSH headings : Dust; New Mexico; Radiation Monitoring / methods; Radiation Monitoring / statistics & numerical data; Radiation Protection; Radioactive Waste / analysis; Radon Daughters / analysis; Sensitivity and Specificity; Sodium Chloride
TL;DR: While considering the regulatory and site specific requirements for Continuous Air Monitor responses in the Waste Isolation Pilot Plant underground, a number of issues relating to the buildup of salt on the filters must be considered when determining the alarm set points. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2002 journal article

Beta CAM alarm set-point determination using historical data at the WIPP

Radiation Protection Management, 19, 16–24.

By: R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2002 journal article

DOSE RATE PREDICTION METHODOLOGY FOR REMOTE HANDLED TRANSURANIC WASTE WORKERS AT THE WASTE ISOLATION PILOT PLANT

Health Physics, 83(4), 449–455.

By: R. Hayes*

Contributors: R. Hayes*

author keywords: waste management; exposure; personnel; regression; ALARA
MeSH headings : Algorithms; Government Agencies; Humans; Models, Theoretical; New Mexico; Occupational Exposure; Radiation Monitoring; Radioactive Waste; Radiometry; Refuse Disposal / methods; United States; Uranium
TL;DR: An approach is described for estimating future dose rates to Waste Isolation Pilot Plant workers processing remote handled transuranic waste that becomes the basis for Safety Analysis Report dose rate estimates and for present and future ALARA design reviews when attempts are made to reduce worker doses. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2002 journal article

Preliminary Measurements of Surface Removable NORM Activity in the WIPP Underground

Health Physics, 82(Supplement), S103–S107.

By: R. Hayes*, C. Gadbury & T. Goff

author keywords: operational topic; surface contamination; waste management; radioactivity, natural
MeSH headings : Air Pollution, Radioactive / analysis; Humans; Occupational Exposure / prevention & control; Radioactive Waste; Radiometry / methods; Refuse Disposal / methods; Sensitivity and Specificity; Time Factors
TL;DR: It was found from over 40 smears taken during a two week period that surface removable activity from Naturally Occurring Radioactive Material (NORM) can be predicted to be within a factor of 2 or 3 using either a fixed air sampler measurement or even another smear measurement from a specified surface. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2001 journal article

Internal contamination evaluation of a radioactive materials shipping container using a radiation assessment filter

Radiation Protection Management, 18(6), 30–38.

By: T. Goff & R. Hayes

Source: NC State University Libraries
Added: November 6, 2020

2000 journal article

A method for identification of interfering signals in EPR dating of tooth enamel

Radiation Measurements, 32(5-6), 781–785.

By: R. Hayes* & E. Haskell

author keywords: EPR; ESR; tooth enamel; dating; dosimetry
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

2000 journal article

A virtually nondestructive EPR technique accounting for diagnostic X-rays

Radiation Measurements, 32(5-6), 559–566.

By: R. Hayes*, E. Haskell*, G. Kenner* & J. Barrus*

TL;DR: The teeth were American wisdom teeth having unknown doses applied by the IAEA in the range of 0 to 1 Gy as part of the second international intercomparison on EPR tooth dosimetry. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: ORCID, Crossref, NC State University Libraries
Added: November 15, 2019

2000 journal article

Accurate EPR radiosensitivity calibration using small sample masses

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 441(3), 535–550.

By: R. Hayes*, E. Haskell*, J. Barrus*, G. Kenner* & A. Romanyukha*

author keywords: EPR; dosimetry; tooth enamel; ionizing radiation; nondestructive
TL;DR: A procedure in retrospective EPR dosimetry is demonstrated which allows for virtually nondestructive sample evaluation in terms of sample irradiations and shows that by making all the recommended corrections, very small masses can be both accurately measured and correlated with measurements of other samples. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2000 journal article

Assessment of an alanine EPR dosimetry technique with enhanced precision and accuracy

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 440(2), 453–461.

By: R. Hayes*, E. Haskell, A. Wieser, A. Romanyukha*, B. Hardy* & J. Barrus

author keywords: EPR; ESR; ionizing radiation; dosimetry; alanine; nondestructive
TL;DR: Dose reconstruction in the course of a series of blind tests demonstrated that an accuracy of 10 mGy for low doses and 1% for high doses can be achieved using EPR spectroscopy. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2000 journal article

Comparison of sample preparation and signal evaluation methods for EPR analysis of tooth enamel

Applied Radiation and Isotopes, 52(5), 1059–1064.

By: A. Wieser*, S. Onori*, D. Aragno*, P. Fattibene*, A. Romanyukha*, E. Ignatiev*, A. Koshta*, V. Skvortzov* ...

author keywords: EPR; tooth enamel; dose reconstruction
MeSH headings : Dental Enamel / radiation effects; Electron Spin Resonance Spectroscopy / methods; Electron Spin Resonance Spectroscopy / statistics & numerical data; Humans; Radiometry; Reproducibility of Results
TL;DR: The reproducibility of the dosimetric signal and its estimated relation with the absorbed dose was found to be very close for the applied methods with one possible exception. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2000 journal article

EPR-dosimetry with carious teeth

Radiation Measurements, 32(5-6), 799–803.

By: S. Sholom, E. Haskell*, R. Hayes*, V. Chumak & G. Kenner*

TL;DR: Reduction of the native signal intensity, particularly in the carious portions, was found to be the only significant effect, which resulted in a slight improvement in the accuracy of the reconstructed doses. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

2000 journal article

Preliminary report on the development of a virtually nondestructive additive dose technique for EPR dosimetry

Applied Radiation and Isotopes, 52(5), 1065–1070.

By: E. Haskell, R. Hayes*, A. Romanyukha* & G. Kenner

author keywords: alanine; EPR; ESR; dosimetry; ionizing radiation; transfer dosimetry; nondestructive
MeSH headings : Dental Enamel / radiation effects; Electron Spin Resonance Spectroscopy / methods; Electron Spin Resonance Spectroscopy / statistics & numerical data; Humans; Radioactive Hazard Release; Radiometry / methods; Radiometry / statistics & numerical data; Reproducibility of Results; Sensitivity and Specificity
TL;DR: A specialized routine is outlined whereby the sample may be left for the most part unirradiated, while only a small aliquot of the sample will be additively irradiated to relatively large doses in EPR dosimetry studies for tooth enamel specimens. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

2000 journal article

The second international intercomparison on EPR tooth dosimetry

Radiation Measurements, 32(5-6), 549–557.

By: A. Wieser, K. Mehta*, S. Amira*, D. Aragno*, S. Bercea*, A. Brik, A. Bugai, F. Callens* ...

TL;DR: The objective of the programme was to bring together all methods which are currently applied by different laboratories for EPR dose reconstruction and to demonstrate the present state of dosimetry. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

1999 journal article

A comparison of optically stimulated luminescence dating methods applied to Eolian sands from the Mojave desert in Southern Nevada

Quaternary Science Reviews, 18(2), 235–242.

By: E. Haskell, R. Difley, G. Kenner, R. Hayes*, K. Snyder* & D. Gustafson*

Sources: Crossref, NC State University Libraries
Added: December 16, 2019

1999 journal article

Achievable Precision and Accuracy in EPR Dosimetry of Tooth Enamel

Radiation Protection Dosimetry, 84(1), 527–535.

By: E. Haskell, R. Hayes*, G. Kenner, A. Wieser, D. Aragno, P. Fattibene, S. Onori

Source: ORCID
Added: November 15, 2019

1999 journal article

An EPR Dosimetry Method For Rapid Scanning of Children Following A Radiation Accident Using Deciduous Teeth

Health Physics, 76(2), 137–144.

By: E. Haskell*, R. Hayes* & G. Kenner

author keywords: accident analysis; electrons; screening measurements; children
MeSH headings : Child; Dental Enamel / chemistry; Electron Spin Resonance Spectroscopy / methods; Female; Humans; Incisor; Mass Screening; Radiation Monitoring / methods; Radioactive Hazard Release; Tooth, Deciduous / chemistry
TL;DR: Electron paramagnetic resonance dosimetry may be applied to whole deciduous teeth of children and makes it feasible to make direct measurement of absorbed gamma ray dose in the days and weeks following a nuclear accident, particularly if used in conjunction with a public awareness program. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: ORCID
Added: November 15, 2019

1999 journal article

Automated Spectral Manipulation and Data Analysis for EPR Dosimetry of Teeth

Radiation Protection Dosimetry, 84(1), 521–526.

By: E. Haskell, R. Hayes*, A. Romanyukha, J. Barrus & G. Kenner

TL;DR: The method is shown to correlate with conventional spectral peak-to-peak values to within 10 mGy for the reconstructed doses andaired difference t-test data show that definitive systematic differences exist but that these effects on the reconstructed dose accuracy and precision are negligible. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1999 journal article

Electron paramagnetic resonance dosimetry: Methodology and material characterization

Med. Phys., 26(11), 2516.

By: R. Hayes*

Contributors: R. Hayes*

Source: ORCID
Added: November 15, 2019

1999 journal article

Geographic Variations in the EPR Spectrum of Tooth Enamel

Radiation Protection Dosimetry, 84(1), 445–449.

By: A. Romanyukha, R. Hayes*, E. Haskell & G. Kenner

TL;DR: Internal structure of the native signal and variations of its amplitude and linewidth were investigated for the samples prepared from modern teeth obtained from different geographic locations (USA and Russia) and possible reasons for the variations observed are discussed. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1998 journal article

A High Sensitivity EPR Technique for Alanine Dosimetry

Radiation Protection Dosimetry, 77(1), 43–49.

By: E. Haskell, R. Hayes* & G. Kenner

Source: ORCID
Added: November 15, 2019

1998 journal article

An assessment of the Levenberg-Marquardt fitting algorithm on saturating exponential data sets

Ancient TL, 16(2), 57–62.

By: R. Hayes, E. Haskell & G. Kenner

Source: NC State University Libraries
Added: November 6, 2020

1998 journal article

EPR Dosimetry of Pacific Walrus (Odobenus Rosmarus Divergens) Teeth

Radiation Protection Dosimetry, 77(1), 55–63.

By: R. Hayes*, G. Kenner & E. Haskell

TL;DR: The potential for EPR dosimetry using walrus tooth cementum was examined and a complex native signal was seen in all samples, similar to that occurring in human tooth enamel. (via Semantic Scholar)
UN Sustainable Development Goal Categories
14. Life Below Water (OpenAlex)
Source: ORCID
Added: November 15, 2019

1998 journal article

EPR Properties of Synthetic Apatites, Deorganified Dentine, and Enamel

Calcified Tissue International, 62(5), 443–446.

By: G. Kenner*, E. Haskell*, R. Hayes*, A. Baig* & W. Higuchi*

author keywords: apatite; enamel; dentine; dosimetry; EPR
MeSH headings : Apatites / chemistry; Apatites / radiation effects; Cobalt Radioisotopes; Dental Enamel / chemistry; Dental Enamel / radiation effects; Dentin / chemistry; Dentin / radiation effects; Durapatite / chemistry; Electron Spin Resonance Spectroscopy / methods; Humans; Spectroscopy, Fourier Transform Infrared; X-Ray Diffraction
TL;DR: Electron paramagnetic resonance spectroscopy was used to study synthetic hydroxyapatite and ∼1, 2, and 6% synthetic carbonated apatites, deorganified dentine, and enamel and established that the precenters responsible for the dosimetric signal are preferentially concentrated in the surface-accessible region of the mineral component. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1998 journal article

Influence of crushing and additive irradiation procedures on EPR dosimetry of tooth enamel

Radiation Measurements, 29(1), 105–111.

By: S. Sholom, E. Haskell*, R. Hayes*, V. Chumak & G. Kenner*

TL;DR: A new interpretation of transient signals 1108 is proposed which explains the above phenomena and recommendations about how to use this interpretation in retrospective EPR dosimetry are given. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1998 journal article

Properties of light induced EPR signals in enamel and their possible interference with gamma-induced signals

Radiation Measurements, 29(1), 113–118.

By: S. Sholom, E. Haskell*, R. Hayes*, V. Chumak & G. Kenner*

TL;DR: Exposure of tooth enamel to natural and artificial UV light results in stable EPR signals with g-factors that are sensitive to both gamma-ray and sunlight exposure, however, their responses to light differed from that to radiation, giving rise to the possibility of using them as indicators of the dose-equivalent resulting from light exposure. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1998 journal article

Technique for increasing reproducibility in EPR dosimetry of tooth enamel

Meas. Sci. Technol., 9(12), 1994–2006.

By: R. Hayes*, E. Haskell*, A. Romanyukha* & G. Kenner*

author keywords: EPR; ESR; enamel; dosimetry; ionizing; radiation
Source: ORCID
Added: November 15, 2019

1997 journal article

A mathematical approach to optimal selection of dose values in the additive dose method of EPR dosimetry

Radiation Measurements, 27(2), 315–323.

By: R. Hayes*, E. Haskell* & G. Kenner*

TL;DR: The optimal spacing is shown to be a concentration of points near the zero dose value with fewer spectra taken at a single high dose value within the range of known linearity. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1997 journal article

An EPR intercomparison using teeth irradiated prior to crushing

Radiation Measurements, 27(2), 419–424.

By: E. Haskell, G. Kenner, R. Hayes*, S. Sholom & V. Chumak

TL;DR: An intercomparison of methods used for EPR dosimetry of enamel was made by the Center for Applied Dosimetry at the University of Utah and the Scientific Center for Radiation Medicine in the Ukraine and showed that both methods were in good agreement with the applied dose. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1997 report

EPR dosimetry teeth in past and future accidents: A prospective look at a retrospective method

By: E. Haskell, G. Kenner, R. Hayes*, V. Chumak & S. Shalom*

TL;DR: In the case of children, deciduous teeth, which are shed between the ages of 7 and 13, can be a very important dosimetric source if documented collection is implemented shortly following an accident. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: ORCID
Added: November 15, 2019

1997 journal article

Electron Paramagnetic Resonance Techniques and Space Biodosimetry

Radiation Research, 148(5), S51.

By: E. Haskell, R. Hayes*, G. Kenner, S. Sholom & V. Chumak

TL;DR: The current status of EPR dosimetry of teeth as applied to retrospective measurements of accidental exposures is reviewed, future research directions which will further reduce the limits of detection are outlined and a lightweight, high-sensitivity, in vivo EPR spectrometer is outlined. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

1997 journal article

Improved accuracy of EPR dosimetry using a constant rotation goniometer

Radiation Measurements, 27(2), 325–329.

By: E. Haskell*, R. Hayes* & G. Kenner*

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: ORCID
Added: November 15, 2019

1996 report

EPR dosimetry of whole deciduous tooth using a constant rotation goniometer and background subtraction with a dentine standard

By: E. Haskell, R. Hayes* & G. Kenner*

TL;DR: A rapid method of electron paramagnetic resonance (EPR) dosimetry of dental enamel will allow screening of whole deciduous teeth of children following a nuclear accident and is capable of measuring doses of less than 100 mGy. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1996 report

Influence of crushing and additive irradiation procedures on EPR dosimetry of tooth enamel

By: S. Shalom, V. Chumak, E. Haskell, R. Hayes* & G. Kenner*

Source: ORCID
Added: November 15, 2019

1996 journal article

Preparation-induced errors in EPR dosimetry of enamel: Pre- and post-crushing sensitivity

Applied Radiation and Isotopes, 47(11-12), 1305–1310.

By: E. Haskell*, R. Hayes* & G. Kenner*

MeSH headings : Dental Enamel / chemistry; Dental Enamel / radiation effects; Dose-Response Relationship, Radiation; Electron Spin Resonance Spectroscopy / methods; Electron Spin Resonance Spectroscopy / statistics & numerical data; Evaluation Studies as Topic; Free Radicals / analysis; Free Radicals / radiation effects; Gamma Rays; Humans; In Vitro Techniques; Radiometry / methods; Radiometry / statistics & numerical data
TL;DR: The effect of gamma irradiation applied to the specimens before and after crushing found that post-crushing irradiation altered the slope of the dose-response curve of the hydroxyapatite signal and produced a grain-size-dependent offset. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1996 report

Preparation-induced errors in EPR dosimetry of enamel: pre- and post-crushing sensitivity

By: E. Haskell*, R. Hayes* & G. Kenner*

TL;DR: It is found that post-crushing irradiation altered the slope of the dose-response curve of the hydroxyapatite signal and produced a grain-size dependent offset. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1996 report

Properties of light induced EPR signals in enamel and their possible interference with gamma-induced signals

By: S. Shalom, V. Chumak, E. Haskell, R. Hayes* & G. Kenner

Source: ORCID
Added: November 15, 2019

1996 journal article

The first international intercomparison of EPR-dosimetry with teeth: First results

Applied Radiation and Isotopes, 47(11-12), 1281–1286.

By: V. Chumak, I. Bailiff*, N. Baran*, A. Bugai, S. Dubovsky*, I. Fedosov*, V. Finin*, E. Haskell* ...

MeSH headings : Dental Enamel / chemistry; Dental Enamel / radiation effects; Electron Spin Resonance Spectroscopy / methods; Electron Spin Resonance Spectroscopy / statistics & numerical data; Evaluation Studies as Topic; Free Radicals / analysis; Free Radicals / radiation effects; Humans; Laboratories; Radiation Tolerance; Radiometry / methods; Radiometry / statistics & numerical data
TL;DR: Peculiarities of experimental approaches are discussed systematically in terms of procedure for recording the EPR-spectra, determination of the amplitude of the radiation induced signal, determinationof the dose, and error propagation. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

1995 journal article

Effect of mechanically induced background signal on EPR dosimetry of tooth enamel

Radiation Measurements, 24(3), 249–254.

By: V. Polyakov, E. Haskell*, G. Kenner*, G. Huett & R. Hayes*

TL;DR: It was determined that 220 mGy was the lowest absorbed dose that could be reliably detected, while doses as low as 44 mGy could tentatively be identified. (via Semantic Scholar)
Source: ORCID
Added: November 15, 2019

1995 journal article

Electron Paramagnetic Resonance Dosimetry of Dentine Following Removal of Organic Material

Health Physics, 68(4), 579–584.

By: E. Haskell*, G. Kenner & R. Hayes*

author keywords: RADIATION DOSE; DOSIMETRY; EXPOSURE, RADIATION; ACCIDENTS, NUCLEAR
MeSH headings : Dentin / radiation effects; Electron Spin Resonance Spectroscopy / methods; Feasibility Studies; Humans; Magnetics; Radiation Monitoring / methods; Tooth Extraction
TL;DR: The feasibility of using dentine from surgically extracted human teeth as in vivo dosimeters was investigated and it was concluded that doses of 500 mGy or less may be resolved with prior removal of the organic component of dentine. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: December 16, 2019

Employment

Updated: July 25th, 2021 14:14

2021 - present

Elsevier BV Amsterdam, Noord-Holland, NL
Associate Editor Radiation Physics and Chemistry

2015 - present

North Carolina State University Raleigh, NC, US
Associate Professor Nuclear Engineering

2015 - 2021

Tetra Tech Inc Oak Ridge, TN, US
Senior Project Manager Nuclear

2008 - 2015

Nuclear Waste Partnership LLC Carlsbad, NM, US
Principle Engineer Nuclear Safety

2008 - 2011

University of the Southwest Hobbs, NM, US
Adjunct Professor Arts and Sciences

2005 - 2008

National Security Technologies LLC Las Vegas, NV, US
Senior Scientist Consequence Assessment

2000 - 2005

Washington TRU Solutions, LLC Carlsbad, NM, US
Senior Engineer Radiological Engineering

Education

Updated: July 28th, 2018 14:20

1997 - 1999

University of Utah Salt Lake City, UT, US
PhD Nuclear Engineering

1994 - 1997

University of Utah Salt Lake City, UT, US
MS Physics

1989 - 1994

University of Utah Salt Lake City, UT, US
BS Mathematics

1989 - 1994

University of Utah Salt Lake City, UT, US
BS Physics

Funding History

Funding history based on the linked ORCID record. Updated: July 28th, 2018 14:07

grant January 1, 2018 - January 1, 2020
Retrospective Characterization of Nuclear Material with TL/OSL
U.S. Department of Energy
contract January 1, 2015 - January 1, 2017
Joint Faculty Appointment
Oak Ridge National Laboratory
grant
Faculty development
U.S. Nuclear Regulatory Commission

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