Measurements of fast neutron scattering in plastic scintillator with energies from 20 to 200 MeV

Measurements of fast neutron scattering in plastic scintillator with energies from 20 to 200 MeV
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能量为 20 至 200 MeV 的塑料闪烁体中快中子散射的测量

DOI:
10.1016/j.nima.2019.162436
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发表时间:
2019
期刊:
Detectors and Associated Equipment
影响因子:
--
通讯作者:
Wantz, A.
Wantz, A.
中科院分区:
--
文献类型:
--
作者:
Rogers, W.F.;Kuchera, A.N.;Boone, J.;Frank, N.;Mosby, S.;Thoennessen, M.;Wantz, A.

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在有机塑料闪烁体阵列中观察到能量范围为20至200 MeV的中子散射,作为两个基于GEANT 4的模型模拟准确性的测试。实验是在洛斯阿拉莫斯国家实验室的LANSCE WNR设施中进行的,使用具有明确能量和轨迹的准直中子束撞击在16个BC-408塑料闪烁体探测器上,这些探测器排列在水平阵列中,2个探测器高,8个探测器深。中子散射观测的结果包括命中多重性分布,束衰减深度,串扰事件,散射角,命中之间的衰减深度,以及来自碳核的中子的暗散射,所有这些都是入射中子能量的函数。测量结果进行了比较,从两个GEANT 4为基础的Monte Carlo模拟预测,和协议的中子能量变化很大,成为穷人在更高的能量,指出需要改进的塑料闪烁体中的中子模拟。
Scattering of neutrons with energies ranging from 20 to 200 MeV was observed in an organic plastic scintillator array as a test for accuracy of simulation by two GEANT4-based models. The experiment was conducted at the LANSCE WNR facility at Los Alamos National Laboratory using a collimated neutron beam of well-defined energy and trajectory impinging on 16 BC-408 plastic scintillator detectors arranged in a horizontal array 2 detectors tall and 8 deep. Results from neutron scattering observations include hit-multiplicity distributions, beam attenuation depth, crosstalk events, scattering angle, attenuation depth between hits, and dark-scattering of neutrons from carbon nuclei, all as a function of the incident neutron energy. Measurement results are compared with predictions from two GEANT4-based Monte Carlo simulations, and agreement varies considerably over neutron energy, becoming poor at higher energies, pointing to needed improvement in simulation of neutrons in plastic scintillator.
n-p 和 n-C 横截面的汇编及其在蒙特卡罗程序中的使用,以计算塑料闪烁体在 1-300 MeV 能量范围内的中子探测效率
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