Simulation Calculation of Neutron Energy Spectrum andAngular Distribution for T(d,n)4He Intense Neutron Generator
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摘要: 采用将厚靶分割成薄靶的方法对厚氚钛靶、260 keV氘束流能量条件下T(d, n)4He反应中子源的能谱和角分布进行计算。以分割法计算得到的能谱和角分布数据为基础，建立了D-T中子源Monte-Carlo模拟抽样模型，在考虑中子发生器各元件材料及实验大厅墙壁对快中子的慢化、散射和吸收的条件下，采用MCNP程序对兰州大学3×1012 s-1强流中子发生器260 keV氘束流能量下的中子能谱和角分布进行了模拟，给出了模拟结果。为检验模拟结果的可靠性，与实验测量能谱进行了比较，Monte-Carlo模拟谱和实验测量谱基本符合。Abstract: Neutron energy spectrum and angular distribution were computed for T(d, n)4He reaction neutron source with 260 keV deuteron beam and TiT 1.5 thick target. The data were applied to simulate the neutron energy spectrum and angular distribution of Lanzhou University 3×1012 s-1 intense neutron generator with 260 keV deuteron beam using MCNP. The interactions of neutron and the materials of neutron generator and laboratary wall were included in this MCNP simulation. The simulation results on the neutron energy spectrum and angular distribution of Lanzhou University 3×1012 s-1 intense neutron generator with 260 keV deuteron beam were presented. Moreover, the simulation neutron energy spectrum was compared with the experimental neutron energy spectrum for verifying the reliability of Monte-Carlo simulation results.
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