A Monte Carlo simulation study for the gamma-ray/neutron dual-particle imager using rotational modulation collimator (RMC).

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2018
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Abstract
The aim of this work is to develop a gamma-ray/neutron dual-particle imager, based on rotational modulation collimators (RMCs) and pulse shape discrimination (PSD)-capable scintillators, for possible applications for radioactivity monitoring as well as nuclear security and safeguards. A Monte Carlo simulation study was performed to design an RMC system for the dual-particle imaging, and modulation patterns were obtained for gamma-ray and neutron sources in various configurations. We applied an image reconstruction algorithm utilizing the maximum-likelihood expectation-maximization method based on the analytical modeling of source-detector configurations, to the Monte Carlo simulation results. Both gamma-ray and neutron source distributions were reconstructed and evaluated in terms of signal-to-noise ratio, showing the viability of developing an RMC-based gamma-ray/neutron dual-particle imager using PSD-capable scintillators.
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Authors Kim, Hyun Suk;Choi, Hong Yeop;Lee, Gyemin;Ye, Sung-Joon;Smith, Martin B;Kim, Geehyun;
Journal journal of radiological protection : official journal of the society for radiological protection
Year 2018
DOI
10.1088/1361-6498/aaa3c8
URL
Keywords
lvr-15 neutron spectrometry reactor dosimetry si neutron filter stilbene

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