Measurement and analysis of an angular neutron flux on a beryllium slab irradiated with deuterium-tritium neutrons
Measurement and analysis of an angular neutron flux on a beryllium slab irradiated with deuterium-tritium neutrons
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DOI：
10.13182/nse87-a23504
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发表时间：
1987-11
影响因子：
1.2
通讯作者：
Y. Oyama;H. Maekawa
中科院分区：
文献类型：
--
作者：
Y. Oyama;H. Maekawa
用氘-氚中子辐照测量了铍板组件表面泄漏的角中子通量。实验采用飞行时间技术，在NE-213型闪烁探测器上进行。测量到的中子能量范围为50 keV ~ 15 MeV。采用JENDL-3PRI、ENDF/B-IV和美国洛斯阿拉莫斯国家实验室核数据文件中的铍数据，与蒙特卡罗程序、MORSE-DD和MCNP计算的结果进行了比较。用这些文件计算的结果与实验结果相差20 ~ 30%。指出文件中14.8 mev中子的弹性截面和非弹性反应总截面的角分布不足以再现实测光谱。
Angular neutron fluxes leaking from the surface of beryllium slab assemblies have been measured with irradiation of deuterium-tritium neutrons. The experiment was performed using the time-of-flight technique with an NE-213 scintillation detector. The measured neutron energy range was from 50 keV to 15 MeV. The thicknesses of the slabs were 50.8 and 152.4 mm, and the measured angles of the angular fluxes were 0.0, 12.2, 24.9, 41.8, and 66.8 deg. The experimental results have been compared with the results calculated by the Monte Carlo codes, MORSE-DD and MCNP, using the data of beryllium in the JENDL-3PRI, ENDF/B-IV, and Los Alamos National Laboratory nuclear data files. The results calculated with these files showed discrepancies of 20 to 30% from the experimental results. It was pointed out that the angular distributions of an elastic cross section and the total cross section of an inelastic reaction for 14.8-MeV neutrons in the files were insufficient to reproduce the measured spectra.