Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1822735 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2014 | 11 Pages |
Abstract
Different reference set-ups are considered in order to test source geometry effects, source materials and different detectors. In particular, a 220Â L drum, a 2Â m3 box filled with uniformly contaminated cellulose or PVC, and small BE3825 and large BE5030 Canberra detectors are considered. Detection efficiencies calculated by ISOCS software are compared against a completely stochastic MCNPX simulation procedure, that is unaffected by any algorithmic correction. MCNPX simulations demonstrate, when widening collimators' cone but maintaining the angular aperture unchanged, that ISOCS and MCNPX difference percentage between efficiency data points reduces, depending on energy, by more than 50%. This happens as far as the shadow-shielded portion of detector's active area reduces.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Massimo Altavilla, Romolo Remetti,