强激光与粒子束2012，Vol.24Issue(10)：2464-2468,5.DOI:10.3788/HPLPB20122410.2464
5单元中子散射相机仿真研究
Simulation research of neutron scatter camera with five units
摘要
Abstract
As a neutron detecting and imaging device used for detection of special nuclear material (SNM) , the newly reported neutron scatter camera can acquire the neutron position and energy information simultaneously. Zn this paper, the particle transport code MCNP was used together with the program MATLAB and Fortran to simulate a five-units prototype of a neutron scatter camera, and to reconstruct the image and energy of a 252Cf neutron source. The calculation results show that the camera' s energy resolution is about 9% sad its angular resolution is related to the si2e of the scintiHators; when the neutron energy equals 2 MeV, the detection efficiency reaches a maximum; the distance of the source, the size of the scintiHators, the distance between the front and rear surfaces of the detectors, and the number of the events have influence on the resolution of the image to a certain extent; the scatter camera can measure the fission neutron energy spectrum, but the factors such as the camera's structure and detection threshold could result in some inaccuracy of the measurement. This simulation work lays a foundation for further experimental research, and its conclusion can be generalized to the neutron scatter camera with much units.关键词
中子散射相机/特种核材料/散射中子/粒子输运程序Key words
neutron scatter camera/ special nuclear material/ scattering neutron/ Particle transport code分类
能源科技引用本文复制引用
张显鹏,张美,盛亮,欧阳晓平..5单元中子散射相机仿真研究[J].强激光与粒子束,2012,24(10):2464-2468,5.基金项目
国家自然科学基金项目(11105106) （11105106）
