钒球14MeV中子的泄漏能谱测量

Neutronics Experiment of Vanadium Shell Benchmark With 14 MeV Neutron Source

摘要: 建立了厚度为 1 0 5cm的金属钒球基准实验装置。钒的纯度为 99 9%。用NE 2 1 3谱仪测量了d T中子的 0 75～ 1 5MeV泄漏中子能谱, 能量大于 0 75MeV的中子的穿透率为 0 84± 0 0 3, 中子能谱实验误差为 5 %～ 7%。用MCNP/ 4AMonte Carlo程序和FENDL 2库核数据进行了模拟计算, 并与实验结果进行了比较

Abstract: A benchmark of vanadium shell with thickness of 10.5 cm is established. The purity of the material is 99.9%. The leakage neutron spectrum is measured using NE 213 spectrometer. The energy range of measured neutron spectrum is 0.75～15 MeV. The overall experimental error is 5%～7%. The transmissivity of neutron with energy≥0.75 MeV is 0.84±0.03. The measured result is compared with the calculated by using MCNP/4A code and FENDL 2 data bank.