Monte Carlo investigation of a high-efficiency, two-plane Compton camera for long-range localization of radioactive materials

被引：8

作者：

Poitrasson-Riviere, Alexis ^{[1
]}

Maestas, Ben A. ^{[1
]}

Hamel, Michael C. ^{[1
]}

Clarke, Shaun D. ^{[1
]}

Flaska, Marek ^{[1
]}

Pozzi, Sara A. ^{[1
]}

Pausch, Guntram ^{[2
]}

Herbach, Claus-Michael ^{[2
]}

Gueorguiev, Andrey ^{[2
]}

Ohmes, Martin F. ^{[2
]}

Stein, Juergen ^{[2
]}

机构：

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Detect Nucl Nonproliferat Grp, Ann Arbor, MI 48109 USA

[2] FLIR Radiat GmbH, D-42651 Solingen, Germany

来源：

PROGRESS IN NUCLEAR ENERGY | 2015年 / 81卷

关键词：

Compton imaging; Gamma rays; Monte Carlo simulations; Organic scintillators; Inorganic scintillators; GAMMA-CAMERA; SENSITIVITY; RESOLUTION;

D O I：

10.1016/j.pnucene.2015.01.009

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Compton cameras have become an instrument of interest for long-range localization of radioactive materials in nuclear-nonproliferation applications. In this work, a specialized simulation tool was developed for the optimization of a Compton camera through realistic Monte Carlo simulations. This tool can be used for Compton cameras with different geometries. The MCNPX-PoliMi code was used to simulate Compton scatters and photoelectric absorptions in the camera's detectors. The imaging capability is derived from the physics of Compton scattering and the full-energy information obtained in photoelectric absorptions. The simulated system is a 1 x 1 m(2) Compton camera consisting of two planar arrays of photon detectors. Several scintillators were evaluated: LaBr3, CaF2, and NaI(Tl) (all inorganic scintillators), and C9H10 (plastic organic scintillator). The investigation was carried out with a Cs-137 source. A minimum detectable activity (MDA) was defined and used to assess the performance of cameras based on different detectors. The simulation results show that C9H10 is a reliable, low-cost, scatter-plane material, increasing the MDA by similar to 0.2 mCi when compared to a CaF2 scatter plane. On the other hand, the intrinsic background of LaBr3 undermines its above-average energy resolution as the MDA increased by similar to 0.5 mCi when compared to a NaI(TI) absorption plane. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：127 / 133

页数：7

共 1 条

[1] Monte Carlo Investigation of a High-Sensitivity Two-Plane Compton Camera for Long-Range Detection of SNM
Maestas, Ben A.
Clarke, Shaun D.
Flaska, Marek
Pozzi, Sara A.
Poitrasson-Riviere, Alexis
Pausch, Guntram
Herbach, Claus-Michael
Guergueiev, Andrey
Ohmes, Martin
Stein, Juergen
2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5, 2009, : 964 - +

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