@article{gould_sharapov_2022, title={Fermi's favorite figure: the history of the pseudopotential concept in atomic physics and neutron physics}, volume={47}, ISSN={["2102-6467"]}, DOI={10.1140/epjh/s13129-022-00042-z}, abstractNote={Abstract In the early 1930’s, Fermi wrote two papers in which he introduced the concepts of “scattering length” and “pseudopotential.” Since that time, these terms have become universally associated with low energy scattering phenomena. Even though the two papers are very different—one in atomic physics, the other in neutron physics—a simple figure underlies both. The figure appears many times in Fermi’s work. We review how the two papers came about and briefly discuss modern developments of the work that Fermi initiated with these two remarkable papers.}, number={1}, journal={EUROPEAN PHYSICAL JOURNAL H}, author={Gould, Christopher R. and Sharapov, Eduard I}, year={2022}, month={Dec} }
 @article{ahmed_alarcon_aleksandrova_baeßler_barron-palos_bartoszek_beck_behzadipour_berkutov_bessuille_et al._2019, title={A new cryogenic apparatus to search for the neutron electric dipole moment}, volume={14}, ISSN={1748-0221}, url={http://dx.doi.org/10.1088/1748-0221/14/11/P11017}, DOI={10.1088/1748-0221/14/11/P11017}, abstractNote={A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Electric Dipole Moment (EDM). It uses superfluid $^4$He to produce a high density of Ultra-Cold Neutrons (UCN) which are contained in a suitably coated pair of measurement cells. The experiment, to be operated at the Spallation Neutron Source at Oak Ridge National Laboratory, uses polarized $^3$He from an Atomic Beam Source injected into the superfluid $^4$He and transported to the measurement cells as a co-magnetometer. The superfluid $^4$He is also used as an insulating medium allowing significantly higher electric fields, compared to previous experiments, to be maintained across the measurement cells. These features provide an ultimate statistical uncertainty for the EDM of $2-3\times 10^{-28}$ e-cm, with anticipated systematic uncertainties below this level.}, number={11}, journal={Journal of Instrumentation}, publisher={IOP Publishing}, author={Ahmed, M.W. and Alarcon, R. and Aleksandrova, A. and Baeßler, S. and Barron-Palos, L. and Bartoszek, L.M. and Beck, D.H. and Behzadipour, M. and Berkutov, I. and Bessuille, J. and et al.}, year={2019}, month={Nov}, pages={P11017–P11017} }
 @article{gould_haase_2014, title={Lewis Worth Seagondollar Obituary}, volume={67}, ISSN={["1945-0699"]}, DOI={10.1063/pt.3.2319}, number={3}, journal={PHYSICS TODAY}, author={Gould, Chris and Haase, David}, year={2014}, month={Mar}, pages={64–66} }
 @article{gould_sharapov_sonzogni_2014, title={Nuclear Data and the Oklo Natural Nuclear Reactors}, volume={118}, ISSN={["1095-9904"]}, DOI={10.1016/j.nds.2014.04.142}, abstractNote={Data from the Oklo natural nuclear reactors have enabled some of the most sensitive terrestrial tests of time variation of dimensionless fundamental constants. The constraints on variation of αEM, the fine structure constant are particular good, but depend on the reliability of the nuclear data, and on the reliability of the modeling of the reactor environment. We briefly review the history of these tests and discuss our recent work in 1) attempting to better bound the temperatures at which the reactors operated, 2) investigating whether the γ-ray fluxes in the reactors could have contributed to changing lutetium isotopic abundances and 3) determining whether lanthanum isotopic data could provide an alternate estimate of the neutron fluence.}, journal={NUCLEAR DATA SHEETS}, author={Gould, C. R. and Sharapov, E. I. and Sonzogni, A. A.}, year={2014}, month={Apr}, pages={585–587} }
 @misc{davis_gould_sharapov_2014, title={Oklo reactors and implications for nuclear science}, volume={23}, number={4}, journal={International Journal of Modern Physics. E, Nuclear Physics}, author={Davis, E. D. and Gould, C. R. and Sharapov, E. I.}, year={2014} }
 @article{gould_sharapov_2012, title={La-138/139 isotopic data and neutron fluences for Oklo RZ10 reactor}, volume={86}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.86.027601}, abstractNote={Recent years have seen a renewed interest in the Oklo phenomenon, particularly in relation to the study of time variation of the fine structure constant. The neutron fluence is one of the crucial parameters for Oklo reactors. Several approaches to its determination were elaborated in the past. We consider whether it possible to use the present isotopic La138/139 data for RZ10 as an additional indicator of neutron fluences in the active cores of the reactors. We calculate the dependence of the Oklo La138 abundance on neutron fluence and elemental lanthanum concentration. The neutron fluence in RZ10 can be deduced from lanthanum isotopic data, but requires reliable data on the primordial elemental abundance. Conversely, if the fluence is known, the isotope ratio provides information on the primordial lanthanum abundance that is not otherwise easily determined.}, number={2}, journal={PHYSICAL REVIEW C}, author={Gould, C. R. and Sharapov, E. I.}, year={2012}, month={Aug} }
 @article{gould_sharapov_2012, title={Lu-176/Lu-175 thermometry for the Oklo natural reactors: A new examination of old data}, volume={85}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.85.024610}, abstractNote={Background: Lutetium thermometry has been used to analyze Oklo natural nuclear reactor zones but leads to widely varying and puzzling predictions for the temperatures ${T}_{O}$ which in turn impacts bounds on time variation of the fine structure constant $\ensuremath{\alpha}$.Purpose: We revisit results for reactor zone RZ10 in light of new measurements of the isomer branching ratio ${B}^{g}$ in ${}^{175}$Lu neutron capture at 5 and 25 keV.Method: We recalculate predictions for ${T}_{O}$ as a function of ${B}^{g}$ using realistic models of the Oklo neutron flux.Results: We find ${T}_{O}=100\ifmmode\pm\else\textpm\fi{}30$ ${}^{\ensuremath{\circ}}$C using a new value of ${B}^{g}$, in contrast to $350<{T}_{O}<500$ ${}^{\ensuremath{\circ}}$C using the evaluated value at thermal energy.Conclusions: Lutetium thermometry can be applicable to analyses of Oklo reactor data, but a better measurement of ${B}^{g}$ with thermal neutrons is needed to confirm the reliability of temperature predictions.}, number={2}, journal={PHYSICAL REVIEW C}, author={Gould, C. R. and Sharapov, E. I.}, year={2012}, month={Feb} }
 @article{gould_sharapov_sonzogni_2012, title={gamma-ray fluxes in Oklo natural reactors}, volume={86}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.86.054602}, abstractNote={Uncertainty in the operating temperatures of Oklo reactor zones impacts the precision of bounds derived for time variation of the fine structure constant $\alpha$. Improved $^{176}$Lu/$^{175}$Lu thermometry has been discussed but its usefulness may be complicated by photo excitation of the isomeric state $^{176m}$Lu by $^{176}$Lu($\gamma,\gamma^\prime $) fluorescence. We calculate prompt, delayed and equilibrium $\gamma$-ray fluxes due to fission of $^{235}$U in pulsed mode operation of Oklo zone RZ10. We use Monte Carlo modeling to calculate the prompt flux. We use improved data libraries to estimate delayed and equilibrium spectra and fluxes. We find $\gamma$-ray fluxes as a function of energy and derive values for the coefficients $\lambda_{\gamma,\gamma^\prime}$ that describe burn-up of $^{176}$Lu through the isomeric $^{176m}$Lu state. The contribution of the ($\gamma,\gamma^\prime $) channel to the $^{176}$Lu/$^{175}$Lu isotopic ratio is negligible in comparison to the neutron burn-up channels. Lutetium thermometry is fully applicable to analyses of Oklo reactor data.}, number={5}, journal={PHYSICAL REVIEW C}, author={Gould, C. R. and Sharapov, E. I. and Sonzogni, A. A.}, year={2012}, month={Nov} }
 @article{gould_hawari_sharapov_2010, title={Reanalysis of Recent Neutron Diffusion and Transmission Measurements in Nuclear Graphite}, volume={165}, ISSN={["0029-5639"]}, DOI={10.13182/nse09-48}, abstractNote={AbstractWe revisit the determination by Bowman et al. of unusual neutron transport characteristics for a newly fabricated form of graphite [Nucl. Sci. Eng., 159, 182 (2008); Nucl. Sci. Eng., 161, 68 (2009)]. From MCNP modeling and consideration of data from other experiments, we determine revised values for the neutron transport parameters of this graphite. Our reanalysis gives a coherent scattering cross section σcoh ˜ 4 b at 50 meV, a small-angle neutron scattering cross section σsans ˜ 11 to 13 b at 1 meV, and an effective capture cross section σa = 5.8 ± 0.5 mb. Scaled to a graphite reference density of 1.60 g/cm3, we find a diffusion coefficient D = 0.94 ± 0.03 cm and a diffusion length L = 47.7 ± 3.7 cm. Apart from the somewhat larger values of σa and D, these are not untypical parameters for graphite. Based on our investigation, the recent experiments and analysis of Bowman et al. do not give evidence for different transport properties for this newly fabricated graphite.}, number={2}, journal={NUCLEAR SCIENCE AND ENGINEERING}, author={Gould, C. R. and Hawari, A. I. and Sharapov, E. I.}, year={2010}, month={Jun}, pages={200–209} }
 @article{foster_gould_haase_kelley_markoff_tornow_2006, title={Measurement of the relative longitudinal spin-dependent total cross-section difference in (n)over-right-arrow-(d)over-right-arrow scattering}, volume={73}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.73.034002}, abstractNote={We report relative measurements of the $\stackrel{\ensuremath{\rightarrow}}{n}\ensuremath{-}\stackrel{\ensuremath{\rightarrow}}{d}$ longitudinal spin-dependent total cross-section difference $(\ensuremath{\Delta}{\ensuremath{\sigma}}_{L}){}_{d}$, at ${E}_{n}$(lab) = 5.0, 6.88, and 9.0 MeV. The deuteron target was polarized via dynamic nuclear polarization at 250 mK in a 2.5-T external magnetic field. The target polarization was monitored by nuclear magnetic resonance and was calibrated by a $(\ensuremath{\Delta}{\ensuremath{\sigma}}_{L}){}_{d}$ measurement at ${E}_{n}$(lab) = 1.18 MeV. The polarized neutron beams were produced through the $^{3}\mathrm{H}$$(\stackrel{\ensuremath{\rightarrow}}{p},\stackrel{\ensuremath{\rightarrow}}{n})$$^{3}\mathrm{He}$ and $^{2}\mathrm{H}$$(\stackrel{\ensuremath{\rightarrow}}{d},\stackrel{\ensuremath{\rightarrow}}{n})$$^{3}\mathrm{He}$ reactions. The neutron polarizations were determined either by direct measurement or from known or calculated polarization-transfer coefficients. The results for $(\ensuremath{\Delta}{\ensuremath{\sigma}}_{L}){}_{d}$ show agreement with theoretical calculations based on nucleon-nucleon potential models but are not of sufficient precision to distinguish the presence or absence of three-nucleon force contributions to the cross sections.}, number={3}, journal={PHYSICAL REVIEW C}, author={Foster, RD and Gould, CR and Haase, DG and Kelley, JM and Markoff, DM and Tornow, W}, year={2006}, month={Mar} }
 @article{gould_sharapov_lamoreaux_2006, title={Time variability of alpha from realistic models of Oklo reactors}, volume={74}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.74.024607}, abstractNote={We reanalyze Oklo {sup 149}Sm data using realistic models of the natural nuclear reactors. Disagreements among recent Oklo determinations of the time evolution of {alpha}, the electromagnetic fine structure constant, are shown to be due to different reactor models, which led to different neutron spectra used in the calculations. We use known Oklo reactor epithermal spectral indices as criteria for selecting realistic reactor models. Two Oklo reactors, RZ2 and RZ10, were modeled with MCNP. The resulting neutron spectra were used to calculate the change in the {sup 149}Sm effective neutron capture cross section as a function of a possible shift in the energy of the 97.3-meV resonance. We independently deduce ancient {sup 149}Sm effective cross sections and use these values to set limits on the time variation of {alpha}. Our study resolves a contradictory situation with previous Oklo {alpha} results. Our suggested 2{sigma} bound on a possible time variation of {alpha} over 2 billion years is stringent: -0.11{<=}{delta}{alpha}/{alpha}{<=}0.24, in units of 10{sup -7}, but model dependent in that it assumes only {alpha} has varied over time.}, number={2}, journal={PHYSICAL REVIEW C}, author={Gould, C. R. and Sharapov, E. I. and Lamoreaux, S. K.}, year={2006}, month={Aug} }
 @article{davis_gould_mitchell_sharapov_2005, title={Bounds on time reversal violation from polarized neutron capture with unpolarized targets}, volume={110}, ISSN={1044-677X}, url={http://dx.doi.org/10.6028/jres.110.075}, DOI={10.6028/jres.110.075}, abstractNote={We have analyzed constraints on parity-odd time-reversal noninvariant interactions derived from measurements of the energy dependence of parity-violating polarized neutron capture on unpolarized targets. As previous authors found, a perturbation in energy dependence due to a parity (P)-odd time (T)-odd interaction is present. However, the perturbation competes with T-even terms which can obscure the T-odd signature. We estimate the magnitudes of these competing terms and suggest strategies for a practicable experiment.}, number={4}, journal={Journal of Research of the National Institute of Standards and Technology}, publisher={National Institute of Standards and Technology (NIST)}, author={Davis, E.D. and Gould, C.R. and Mitchell, G.E. and Sharapov, E.I.}, year={2005}, month={Jul}, pages={485} }
 @article{greene_cianciolo_koehler_allen_snow_huffman_gould_bowman_cooper_doyle_2005, title={The fundamental neutron physics beamline at the spallation neutron source}, volume={110}, ISSN={["1044-677X"]}, DOI={10.6028/jres.110.015}, abstractNote={The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold neutrons in the world. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental neutron physics. The fundamental neutron physics beamline is anticipated to include two beam-lines; a broad band cold beam, and a monochromatic beam of 0.89 nm neutrons for ultracold neutron (UCN) experiments. The fundamental neutron physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed.}, number={3}, journal={JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY}, author={Greene, G and Cianciolo, V and Koehler, P and Allen, R and Snow, WM and Huffman, P and Gould, C and Bowman, D and Cooper, M and Doyle, J}, year={2005}, pages={149–152} }
 @article{davis_gould_mitchell_sharapov_2004, title={Bounds on P-odd T-odd interactions from polarized neutron capture with unpolarized targets}, volume={69}, ISSN={0556-2813 1089-490X}, url={http://dx.doi.org/10.1103/physrevc.69.015501}, DOI={10.1103/physrevc.69.015501}, abstractNote={We expand on an interesting proposal (by Flambaum and Sushkov) to constrain parity-odd time-reversal noninvariant interactions with measurements of the energy dependence of parity-violating polarized neutron capture on unpolarized targets. We show that the perturbation in energy dependence due a P-odd T-odd interaction is obscured by terms due to electroweak effects. We evaluate for a practicable experiment the influence of these terms on the locations of zeros in a parity-violating asymmetry. Measurements which succeed in putting limits on these shifts of slightly more than the 1 meV or so that we estimate them to be, would constrain the ratio of the rms value of compound nucleus matrix elements of any P-odd T-odd nucleonnucleon interaction to the rms value of compound nucleus matrix elements of the P-odd nucleon-nucleon interaction to be less than of order of 10 ˛2 .}, number={1}, journal={Physical Review C}, publisher={American Physical Society (APS)}, author={Davis, E. D. and Gould, C. R. and Mitchell, G. E. and Sharapov, E. I.}, year={2004}, month={Jan} }
 @article{eguchi_gould_markoff_young_messimore_2004, title={High sensitivity search for (nu)over-bar(e)'s from the Sun and other sources at KamLAND}, volume={92}, number={7}, journal={Physical Review Letters}, author={Eguchi, K. and Gould, C. R. and Markoff, D. M. and Young, A. R. and Messimore, J. A. et al.}, year={2004}, pages={071301} }
 @article{eguchi_enomoto_furuno_goldman_hanada_ikeda_ikeda_inoue_ishihara_itoh_et al._2003, title={First results from KamLAND: evidence for reactor antineutrino disappearance}, volume={90}, DOI={10.1103/PhysRevLett.90.021802}, abstractNote={KamLAND has been used to measure the flux of $\bar{\nu}_e$'s from distant nuclear reactors. In an exposure of 162 ton$\cdot$yr (145.1 days) the ratio of the number of observed inverse $\beta$-decay events to the expected number of events without disappearance is $0.611\pm 0.085 {\rm (stat)} \pm 0.041 {\rm (syst)} $ for $\bar{\nu}_e$ energies $>$ 3.4 MeV. The deficit of events is inconsistent with the expected rate for standard $\bar{\nu}_e$ propagation at the 99.95% confidence level. In the context of two-flavor neutrino oscillations with CPT invariance, these results exclude all oscillation solutions but the `Large Mixing Angle' solution to the solar neutrino problem using reactor $\bar{\nu}_e$ sources.}, number={2}, journal={Physical Review Letters}, author={Eguchi, K. and Enomoto, S. and Furuno, K. and Goldman, J. and Hanada, H. and Ikeda, H. and Ikeda, K. and Inoue, K. and Ishihara, K. and Itoh, W. and et al.}, year={2003}, pages={021802} }
 @book{fundamental physics with pulsed neutron beams : fppnb-2000 : research triangle park, north carolina, usa, 1-3 june 2000_2001, ISBN={9810246676}, publisher={Singapore; River Edge, NJ: World Scientific}, year={2001} }
 @article{walston_gould_haase_raichle_seely_tornow_wilburn_penttila_hoffmann_2001, title={Low-energy NN tensor force from (n)over-right-arrow-(p)over-right-arrow scattering: Results of an accurate experimental approach - art. no. 014004}, volume={6301}, number={1}, journal={Physical Review. C, Nuclear Physics}, author={Walston, J. R. and Gould, C. R. and Haase, D. G. and Raichle, B. W. and Seely, M. L. and Tornow, W. and Wilburn, W. S. and Penttila, S. I. and Hoffmann, G. W.}, year={2001}, pages={4004} }
 @article{raichle_gould_haase_seely_walston_tornow_wilburn_penttila_hoffmann_1999, title={Double polarized neutron-proton scattering and meson-exchange nucleon-nucleon potential models}, volume={83}, ISSN={["0031-9007"]}, DOI={10.1103/physrevlett.83.2711}, abstractNote={We report on polarized beam--polarized target measurements of the spin-dependent neutron-proton total cross-section differences in longitudinal and transverse geometries ( $\ensuremath{\Delta}{\ensuremath{\sigma}}_{L}$ and $\ensuremath{\Delta}{\ensuremath{\sigma}}_{T}$, respectively) between ${E}_{n}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}5$ and 20 MeV. Single-parameter phase-shift analyses were performed to extract the phase-shift mixing parameter ${\ensuremath{\varepsilon}}_{1}$, which characterizes the strength of the nucleon-nucleon tensor interaction at low energies. Consistent with the trend of previous determinations at ${E}_{n}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}25$ and 50 MeV, our values for ${\ensuremath{\varepsilon}}_{1}$ imply a stronger tensor force than predicted by meson-exchange nucleon-nucleon potential models and nucleon-nucleon phase-shift analyses.}, number={14}, journal={PHYSICAL REVIEW LETTERS}, author={Raichle, BW and Gould, CR and Haase, DG and Seely, ML and Walston, JR and Tornow, W and Wilburn, WS and Penttila, SI and Hoffmann, GW}, year={1999}, month={Oct}, pages={2711–2714} }
 @article{davis_gould_1999, title={Extraction of bounds on time-reversal non-invariance from neutron reactions}, volume={447}, ISSN={0370-2693}, url={http://dx.doi.org/10.1016/s0370-2693(99)00013-1}, DOI={10.1016/S0370-2693(99)00013-1}, abstractNote={Ratios involving on-resonance measurements of the three-fold and five-fold correlation cross sections for which the dependence on some of the unknown spectroscopic data is eliminated are considered. Closed form expressions are derived for the statistical distributions of these ratios. Implications for bounds on the variance of matrix elements of time reversal non-invariant nucleon-nucleon interactions are considered within a Bayesian framework and the competitiveness with bounds from other experiments is evaluated. The prospects for null five-fold correlation measurements improving by an order of magnitude or more upon the current bound on a parity-conserving T-odd interaction are good.}, number={3-4}, journal={Physics Letters B}, publisher={Elsevier BV}, author={Davis, E.D. and Gould, C.R.}, year={1999}, month={Feb}, pages={209–215} }
 @article{wilburn_gould_hale_huffman_keith_roberson_tornow_1998, title={Measurements at low energies of the polarization-transfer coefficient K-y(y ') for the reaction H-3((p)over-right-arrow,(n)over-right-arrow)He-3 at 0 degrees}, volume={24}, ISSN={["0177-7963"]}, DOI={10.1007/s006010050074}, abstractNote={Measurements of the transverse polarization-transfer coefficient for the reaction H He are reported for outgoing neutron energies of 1.94, 5.21, and 5.81 MeV. This reaction is important both as a source of polarized neutrons for nuclear-physics experiments, and as a test of theoretical descriptions of the nuclear four-body system. Comparison is made to previous measurements, confirming that the H He reaction can be used as a polarized neutron source with the polarization known to an accuracy of approximately 5%. Comparison to R-matrix theory suggests that the sign of the phase-shift parameter is incorrect. Changing the sign of this parameter dramatically improves the agreement between theory and experiment.}, number={1}, journal={FEW-BODY SYSTEMS}, author={Wilburn, WS and Gould, CR and Hale, GM and Huffman, PR and Keith, CD and Roberson, NR and Tornow, W}, year={1998}, pages={27–38} }
 @article{davis_gould_1998, title={On-resonance deformation effect measurements: A probe of order within chaos in the nucleus}, volume={57}, ISSN={0556-2813 1089-490X}, url={http://dx.doi.org/10.1103/physrevc.57.648}, DOI={10.1103/physrevc.57.648}, abstractNote={The statistics of on-resonance measurements of the deformation effect cross section ${\ensuremath{\sigma}}_{02}$ in unpolarized neutron transmission through an aligned ${}^{165}\mathrm{Ho}$ target is discussed. Under the standard Porter-Thomas assumption about reduced partial width amplitudes, the sign of ${\ensuremath{\sigma}}_{02}$ is random at $s$-wave resonances with $d$-wave admixtures. Motivated by the observation of sign correlations in epithermal parity-violation studies, conditions under which a doorway state will give rise to ${\ensuremath{\sigma}}_{02}$'s of nonrandom sign are identified. Oblate shape isomers lying at excitation energies in the isolated resonance regime could meet these conditions.}, number={2}, journal={Physical Review C}, publisher={American Physical Society (APS)}, author={Davis, E. D. and Gould, C. R.}, year={1998}, month={Feb}, pages={648–654} }
 @article{seestrom_bowman_crawford_delheij_frankle_gould_haase_linuma_knudson_koehler_et al._1998, title={Parity nonconservation in neutron capture on Cd-113}, volume={58}, number={5}, journal={Physical Review. C, Nuclear Physics}, author={Seestrom, S. J. and Bowman, J. D. and Crawford, B. E. and Delheij, P. P. J. and Frankle, C. M. and Gould, C. R. and Haase, D. G. and Linuma, M. and Knudson, J. N. and Koehler, P. E. and et al.}, year={1998}, pages={2977–2985} }
 @article{walston_keith_gould_haase_raichle_seely_tornow_wilburn_hoffmann_penttila_1998, title={Polarization transfer in the H-3((p)over-right-arrow,(n)over-right-arrow)He-3 reaction and the 0(-) level in He-4}, volume={58}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.58.1314}, abstractNote={Longitudinal polarization-transfer coefficients for the ${}^{3}\mathrm{H}(\stackrel{\ensuremath{\rightarrow}}{p},\stackrel{\ensuremath{\rightarrow}}{n}{)}^{3}\mathrm{He}$ reaction have been measured at zero degrees for proton energies of 1.3\char21{}2.8 MeV. The results show a striking resonance behavior for energies corresponding to excitation of the ${0}^{\ensuremath{-}}$ level in ${}^{4}\mathrm{He}$ at 21.0 MeV. In agreement with $R$-matrix calculations, the value approaches unity at 1.52 MeV, the peak of the resonance. Near this same energy, at 1.62 MeV, the transverse polarization-transfer coefficient was measured to be consistent with zero.}, number={2}, journal={PHYSICAL REVIEW C}, author={Walston, JR and Keith, CD and Gould, CR and Haase, DG and Raichle, BW and Seely, ML and Tornow, W and Wilburn, WS and Hoffmann, GW and Penttila, SI}, year={1998}, month={Aug}, pages={1314–1317} }
 @misc{adelberger_austin_bahcall_balantekin_bogaert_brown_buchmann_cecil_champagne_braeckeleer_et al._1998, title={Solar fusion cross sections}, volume={70}, ISSN={["1539-0756"]}, DOI={10.1103/RevModPhys.70.1265}, abstractNote={We review and analyze the available information on the nuclear-fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wherever possible, estimates of the uncertainties. We also describe the most important experiments and calculations that are required in order to improve our knowledge of solar fusion rates.}, number={4}, journal={REVIEWS OF MODERN PHYSICS}, author={Adelberger, EG and Austin, SM and Bahcall, JN and Balantekin, AB and Bogaert, G and Brown, LS and Buchmann, L and Cecil, FE and Champagne, AE and Braeckeleer, L and et al.}, year={1998}, month={Oct}, pages={1265–1291} }
 @article{huffman_gould_haase_1998, title={The deformation effect and time-reversal violation in neutron resonances}, volume={24}, ISSN={["0954-3899"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0032385772&partnerID=MN8TOARS}, DOI={10.1088/0954-3899/24/4/008}, abstractNote={We describe how the deformation effect in nuclear spin aligned can be used to identify small d-wave admixtures in predominantly s-wave resonances. Using standard angular momentum penetrabilities, we estimate deformation effect cross sections for resonances below 500 eV. If d-wave admixtures are identified in a number of s-wave resonances, then a test for a parity-conserving, time-reversal violating term in the neutron-nucleus forward scattering amplitude is possible.}, number={4}, journal={JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS}, author={Huffman, PR and Gould, CR and Haase, DG}, year={1998}, month={Apr}, pages={763–770} }
 @article{haase_keith_gould_huffman_roberson_seely_tornow_wilburn_1998, title={The scattering of polarized neutrons from statically polarized solid He-3}, volume={402}, ISSN={["0168-9002"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0031646245&partnerID=MN8TOARS}, DOI={10.1016/s0168-9002(97)00860-7}, abstractNote={Abstract We have constructed a 0.4 mole solid 3 He target, cryogenically polarized at 12 mK in a field of 7 T. The 0.04 atoms/b target reached a polarization of 38% in 35 h. Such a target may be applied to any experiment which is tolerant of the large ambient magnetic field and which produces target heating of less than a microwatt. High energy neutron and photon scattering experiments meet these requirements. The target's figure of merit for neutron transmission measurement exceeds that of polarized gas targets by greater than 35. At the Triangle Universities Nuclear Laboratory we have used the target to measure the total cross section differences Δσ T and Δσ L for incident polarized neutrons of energies 2–8 MeV. The cross section difference is sensitive to the excited state structure of the n- 3 He system. The results have been compared to a recent R-matrix analysis of R = 4 scattering and reaction data, and provide support for the 4 He level scheme derived from that analysis.}, number={2-3}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT}, author={Haase, DG and Keith, CD and Gould, CR and Huffman, PR and Roberson, NR and Seely, ML and Tornow, W and Wilburn, WS}, year={1998}, month={Jan}, pages={341–346} }
 @article{alfimenkov_chernikov_lason_mareev_novitsky_pikelner_skoy_tsulaya_gould_haase_et al._1997, title={Energy and orientation dependence of neutron depolarization in a large single crystal of ferromagnetic holmium}, volume={81}, ISSN={["0021-8979"]}, DOI={10.1063/1.364179}, abstractNote={We report measurements of the depolarization of epithermal neutrons (1.7–59 eV) in magnetic domains of a 2.0-cm-diam cylindrical single crystal of ferromagnetic holmium. The neutrons were polarized by a dynamically polarized proton target and polarization analyzed using a statically polarized rare-earth spin filter. Based on the dependence of the depolarization on neutron energy and crystal orientation, we determined the domains to be laminar, or needlelike, with the long axis slightly deflected from the c crystalline axis and having an average width of 59 μm.}, number={3}, journal={JOURNAL OF APPLIED PHYSICS}, author={Alfimenkov, VP and Chernikov, AN and Lason, L and Mareev, YD and Novitsky, VV and Pikelner, LB and Skoy, VR and Tsulaya, MI and Gould, CR and Haase, DG and et al.}, year={1997}, month={Feb}, pages={1358–1361} }
 @article{huffman_roberson_wilburn_gould_haase_keith_raichle_seely_walston_1997, title={Test of parity-conserving time-reversal invariance using polarized neutrons and nuclear spin aligned holmium}, volume={55}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.55.2684}, abstractNote={A test of parity-conserving, time-reversal noninvariance (PC TRNI) has been performed in 5.9 MeV polarized neutron transmission through nuclear spin aligned holmium. The experiment searches for the $T$-violating fivefold correlation via a double modulation technique---flipping the neutron spin while rotating the alignment axis of the holmium. Relative cross sections for spin-up and spin-down neutrons are found to be equal to within $1.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ (80% confidence). This is a two orders of magnitude improvement compared to traditional detailed balance studies of time reversal, and represents the most precise test of PC TRNI in a dynamical process, to our knowledge.}, number={5}, journal={PHYSICAL REVIEW C}, author={Huffman, PR and Roberson, NR and Wilburn, WS and Gould, CR and Haase, DG and Keith, CD and Raichle, BW and Seely, ML and Walston, JR}, year={1997}, month={May}, pages={2684–2696} }