Measurement of neutron-production double-differential cross sections ofnatC, 27Al,natFe, andnatPb by 20, 34, 48, 63, and 78 MeV protons in the most-forward direction
Measurement of neutron-production double-differential cross sections ofnatC, 27Al,natFe, andnatPb by 20, 34, 48, 63, and 78 MeV protons in the most-forward direction
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DOI：
10.1016/j.nima.2018.12.049
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发表时间：
2019-03
期刊：
影响因子：
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通讯作者：
D. Satoh;Y. Iwamoto;T. Ogawa
中科院分区：
文献类型：
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作者：
D. Satoh;Y. Iwamoto;T. Ogawa
在这项研究中，中子产生的双微分截面（DDXs）的nat C，27铝，nat Fe，和nat铅轰击20，34，48，63，和78 MeV的质子在最向前的方向上测量的飞行时间（TOF）方法使用液体有机闪烁体。在测量的中子谱中观察到特征峰结构，特别是对于轻核。将实验数据与蒙特卡罗模拟程序“粒子和重离子输运程序系统”（PHITS）的计算结果进行了比较，计算结果采用了Liège核内级联理论模型（INCL）或日本评价核数据库（JENDL-4.0/HE）。虽然JENDL-4.0/HE的结果与实验数据的一致性优于INCL，但对于某些束靶组合，两者都不能再现测量的峰结构。对于能量积分截面，JENDL-4.0/HE在所有情况下都在2倍内再现了实验数据。另一方面，INCL给出的值比实验值大约6倍。
In this study, the neutron-production double-differential cross sections (DDXs) of nat C, 27 Al, nat Fe, and nat Pb bombarded by 20, 34, 48, 63, and 78 MeV protons were measured in the most-forward direction by the time-of-flight (TOF) method using a liquid organic scintillator. Characteristic peak structures were observed in the measured neutron spectra, especially for light nuclei. The experimental data were compared with the results from the Monte Carlo simulation code “Particle and Heavy Ion Transport code System”(PHITS) using the theoretical model Liège Intranuclear Cascade (INCL) or using the Japanese evaluated nuclear data library (JENDL-4.0/HE). While the results of JENDL-4.0/HE were in agreement with the experimental data better than those of INCL, neither could reproduce the measured peak structures for some combinations of the beam and target. For the energy-integrated cross sections, JENDL-4.0/HE reproduced the experimental data within a factor of two in all cases. On the other hand, INCL gave values up to approximately six times larger than the experimental ones.