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- W2967897466 abstract "Abstract In this study, numerical simulations have been carried out to evaluate the effect of moderator parameters (material/dimensions) for standard radio-isotopic/fission (Pu-Be and 252Cf) and fusion sources (D-D). These sources are used for calibrating thermal neutron detectors, which are often employed for determining absolute neutron yield in fusion-based sources. Simulations have been carried out using the Monte Carlo based “FLUKA” code for typical moderator materials and 3He/BF3 proportional counter based thermal neutron detectors. Results have been validated against experimentally measured values for an available radio-isotopic source. A notable difference in the detector efficiency was observed due to the source energy term. The detection efficiency ratio for Pu-Be:D-D:252Cf sources with the same moderator thickness (optimized for 252Cf) was found to be 1 : 1.16±0.02 : 1.40±0.03. For these three types of sources, optimum acrylic (Perspex) and polypropylene moderator thicknesses have been observed to be 100,100,80 mm and 80,80,60 mm respectively with the corresponding efficiency ratio of 1 : 1.15±0.02 : 1.34±0.008." @default.
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- W2967897466 date "2019-11-01" @default.
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- W2967897466 title "Detector sensitivity and calibration for yield measurements in fusion neutron sources" @default.
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- W2967897466 doi "https://doi.org/10.1016/j.nima.2019.162580" @default.
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