D-T中子穿透铁球伴生γ射线泄漏能谱实验研究

Gamma-ray Energy Spectrum Emitted From Iron Shell With D-T Neutron Source

摘要: 建立了系列厚度为 3、6、1 1、1 6、2 1 8cm的铁球基准装置。用BC 5 0 1A谱仪测量了D T中子穿透铁球伴生γ射线泄漏能谱, 能量范围为 0 5～ 5MeV。通过能谱分析, 观测到铁球厚度对能谱有一定影响。利用MCNP4A程序和t 2、ENDF/B Ⅴ、ENDF/B Ⅵ和FENDL 2等数据库对实验进行了模拟计算, 并将计算结果与实验结果进行了比较。γ射线能谱实验误差为 4%～ 6%。

Abstract: A benchmark of iron shell with a series of thickness of 3,6,11,16 and 21.8 cm was established. The leakage gamma-ray energy spectrum emitted by iron sphere from D-T neutron was measured using BC-501A spectrometer, the energy range was 0.5～5 MeV. From the (analysis) of gamma-ray spectrum, the effect of iron shell's thickness on the spectra was found. The measured results are compared with that from calculated by using MCNP4A mode and (t-2,) ENDF/B-Ⅴ, ENDF/B-Ⅵ and FENDL-2 data banks. The overall experimental error of (gamma)-ray spectrum is 4%～6%.