Calculation of the wide-angle neutron spectra from the Be-9(d, xn) reaction in a thick beryllium target
Calculation of the wide-angle neutron spectra from the Be-9(d, xn) reaction in a thick beryllium target
复制标题
计算厚铍靶中 9Be(d, xn) 反应的广角中子谱
DOI：
10.1088/1674-1137/43/5/054001
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发表时间：
2019
影响因子：
3.6
通讯作者：
Yao Ze En
中科院分区：
文献类型：
--
作者：
Wei Zheng;Wang Jun Run;Zhang Ya Ling;Huang Zhi Wu;Ma Zhan Wen;Zhang Jie;Ding Yan Yan;Xia Li;Li Jian Yi;Lu Xiao Long;Zhang Yu;Xu Da Peng;Yang Lei;Yao Ze En
建立了一个多层计算模型，用于计算从0到180的广角中子谱，计算范围为5步，它是用重氦轰击厚铍靶产生的。用TALYS-1.8程序计算了9Be(d，xn)反应的双微分截面(DDCS)。计算结果与实验数据吻合较好，在能量为10.0 MeV时，计算结果明显优于PHITS-JQMD/GEM在15、30、45和60个中子发射角下的计算结果。在TALYS-1.8程序中，直接反应(裂解、剥离和敲除反应)的中子贡献由可调参数控制，这些参数描述了典型直接反应的基本特征，并控制了DDCSs尾部山脊丘的相对强度和位置。结果表明，对于不同的中子发射角和中子角分布，典型的广角中子能谱计算结果与13.5 MeV的实验数据符合得很好。通过对TALYS-1.8程序中可调参数的优化，多层计算模型能够较好地再现实验数据。多层计算模型与实验数据吻合较好，可以较好地预测9Be(d，xn)反应中子源的广角中子能谱、中子角分布和中子产额。
The multi-layer computing model is developed to calculate wide-angle neutron spectra, in the range from 0 to 180 with a 5 step, produced by bombarding a thick beryllium target with deuterons. The double-differential cross-sections (DDCSs) for the 9 Be (d, xn) reaction are calculated using the TALYS-1.8 code. They are in agreement with the experimental data, and are much better than the PHITS-JQMD/GEM results at 15, 30, 45 and 60 neutron emission angles for deuteron energy of 10.0 MeV. In the TALYS-1.8 code, neutron contributions from direct reactions (break-up, stripping and knock-out reactions) are controlled by adjustable parameters, which describe the basic characteristics of typical direct reactions and control the relative intensity and the position of the ridgy hillock at the tail of DDCSs. It is found that the typical calculated wide-angle neutron spectra for different neutron emission angles and neutron angular distributions agree quite well with the experimental data for 13.5 MeV deuterons. The multi-layer computing model can reproduce the experimental data reasonably well by optimizing the adjustable parameters in the TALYS-1.8 code. Given the good agreement with the experimental data, the multi-layer computing model could provide better predictions of wide-angle neutron energy spectra, neutron angular distributions and neutron yields for the 9 Be (d, xn) reaction neutron source.