@article{metwally_gardner_sood_2007, title={Using gamma-gamma coincidence measurements to validate Monte Carlo generated detector response functions}, volume={263}, ISSN={["0168-583X"]}, DOI={10.1016/j.nimb.2007.04.137}, abstractNote={Monte Carlo simulation of gamma-ray transport for the purpose of performing elemental analysis of bulk samples requires the tracking of gamma rays in the sample and also in the detector(s) used. Detector response functions (DRF’s) are an efficient and accurate variance reduction technique that greatly decreases the simulation time by substituting the tracking of gamma rays inside the detector by predefined single energy gamma-ray spectra. These spectra correspond to the average response of the detector for incident gamma rays. DRF’s are generated by Monte Carlo methods and are benchmarked with experimental data. In this work, prompt gamma–gamma coincidence measurements are presented as a way to validate DRF’s for high-energy gamma rays.}, number={1}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS}, author={Metwally, W. A. and Gardner, R. P. and Sood, A.}, year={2007}, month={Oct}, pages={50–53} }
 @article{gardner_sood_2004, title={A Monte Carlo simulation approach for generating NaI detector response functions (DRFs) that accounts for non-linearity and variable flat continua}, volume={213}, ISSN={["0168-583X"]}, DOI={10.1016/S0168-583X(03)01539-8}, abstractNote={A new approach to generating detector response functions (DRFs) for NaI detectors is developed and demonstrated. It consists of using Monte Carlo simulation with a specific purpose code (named g03) that utilizes relatively rigorous gamma-ray transport with very simple electron transport. The approach accounts for two phenomena that have not been previously treated in this way: NaI non-linearity and the variable flat continua part of the DRF. The first is accounted for by utilizing the known non-linear relationship between NaI scintillation efficiency and deposited electron energy within the Monte Carlo code. The second is accounted for by using a semi-empirical relationship between electron range and incident gamma-ray energy within the Monte Carlo code. The resulting DRFs for 3″ × 3″ and 6″ × 6″ NaI detectors are benchmarked with the extensive existing data of Heath [AEC Research and Development Report, Physics, TID-4500] for the 3″ × 3″ detectors and with new data for the 6″ × 6″ detectors. Results indicate that the approach is accurate and the use of this approach should increase the accuracy of prompt gamma-ray neutron activation analysis significantly.}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS}, author={Gardner, RP and Sood, A}, year={2004}, month={Jan}, pages={87–99} }
 @article{sood_gardner_2004, title={A new Monte Carlo assisted approach to detector response functions}, volume={213}, ISSN={["0168-583X"]}, DOI={10.1016/S0168-583X(03)01540-4}, abstractNote={The physical mechanisms that describe the components of NaI, Ge and Si(Li) detector responses have been investigated using Monte Carlo simulation. The mechanisms described focus on the shape of the Compton edge, the magnitude of the flat continuum, and the shape of the exponential tails features. These features are not accurately predicted by previous Monte Carlo simulations. Probable interaction mechanisms for each detector response component are given based on this Monte Carlo simulation.}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS}, author={Sood, A and Gardner, RP}, year={2004}, month={Jan}, pages={100–104} }
 @article{sood_gardner_gray_2000, title={Steady neutron source measurement method for Sigma(a) and Sigma(s) in geological samples}, volume={53}, ISSN={["0969-8043"]}, DOI={10.1016/S0969-8043(00)00235-9}, abstractNote={An improved experimental method, using a steady neutron source in a moderating medium, has been developed to determine thermal neutron absorption and scattering cross sections for bulk geological media using discrete samples. The system design has been optimized and experimental results have been benchmarked using Monte Carlo simulation. Studies have been performed to improve the measurement sensitivity and reproducibility over previous designs. A semi-empirical model has been developed for determining both absorption and scattering cross sections of the sample.}, number={4-5}, journal={APPLIED RADIATION AND ISOTOPES}, author={Sood, A and Gardner, RP and Gray, TK}, year={2000}, pages={603–616} }