摘要
The neutron capture cross section of ^(232)Th was measured at the neutron time-of-flight facility Back-n of China Spallation Neutron Source(CSNS)for the first time.The measurement was performed with 4 hydrogen-free deuterated benzene C6D6 liquid scintillation detectors,in the ES#2 experiment station on the beam line,at a distance of about 76 m from the neutron-production assembly.The total energy detection principle in combination with the pulse height weighting technique(PHWT)was applied to analyze the measured data.Results of the ^(232)Th(n,γ)reaction cross section in the unresolved resonance region from 4 keV to 100 keV were obtained,which shows a good agreement with the existing experimental data from EXFOR,as well as with the evaluated data from the ENDF/B-VIII.0 and CENDL-3.1.In addition,the excitation function of ^(232)Th(n,γ)^(233)Th reaction in the unresolved resonance region was theoretically calculated by using the code TALYS-1.95.By fitting the experimental cross section and theoretical data,the average parameters in the unresolved resonance region were extracted.
作者
姜炳
韩建龙
任杰
蒋伟
王小鹤
郭子安
张江林
胡继峰
陈金根
蔡翔舟
王宏伟
刘龙祥
李鑫祥
胡新荣
张岳
Bing Jiang;Jianlong Han;Jie Ren;Wei Jiang;Xiaohe Wang;Zian Guo;Jianglin Zhang;Jifeng Hu;Jingen Chen;Xiangzhou Cai;Hongwei Wang;Longxiang Liu;Xinxiang Li;Xinrong Hu;Yue Zhang(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;CAS Innovative Academy in TMSR Energy System,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;China Spallation Neutron Source,Dongguan 523803,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China)
基金
supported by the Chinese TMSR Strategic Pioneer Science and Technology Project(Grant No.XDA02010000)
the National Natural Science Foundation of China(Grant No.11790321).
