利用GEANT4和TALYS研究中子与铁作用的次级中子双微分截面  

Calculation of Secondary Neutron Double Differential Cross Sections for Neutron Induced Reactions on Fe with GEANT4 and TALYS

作　　者：刘丙岩 陈志强[1,2] 韩瑞 张鑫[1,2] 田国玉[1] 石福栋 孙慧 LIU Bingyan;CHEN Zhiqiang;HAN Rui;ZHANG Xin;TIAN Guoyu;SHI Fudong;SUN Hui(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049

出　　处：《原子核物理评论》2020年第1期104-108,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11875298);国家自然科学基金委员会-中国科学院大科学装置科学研究联合基金资助项目(U1832205)。

摘　　要：铁的次级中子双微分截面对核装置的设计、运行与维护具有重要作用。相关实验数据缺乏,且评价数据不完善,需要使用可靠的核理论模型进行计算。本工作利用GEANT4程序结合不同的中子评价数据计算了8.17, 11.5, 14.1和18 MeV等入射能量下中子轰击薄铁靶不同出射角度的次级中子双微分截面;同时利用TALYS程序和GEANT4程序结合BIC、BERT和INCLXX模型计算了25.7, 65, 100和150 MeV等入射能量下中子轰击薄铁靶不同出射角度的次级中子双微分截面,并与实验数据进行对比。研究表明,在20 MeV以下能区,ENDF/B-VIII.0库的计算结果与实验数据符合较好,BROND-3.1、CENDL-3.1、JENDL-4.0u和JEFF-3.3库的计算结果与实验数据存在差异。在20~150 MeV能区,GEANT4程序的BERT模型和TALYS程序的计算结果与实验数据符合较好,INCLXX模型和BIC模型的计算结果与实验数据存在分歧。整体来看,需要对铁的中子评价数据和核反应理论模型做进一步研究。The secondary neutron double differential cross sections of iron play an important role in the design, operation and maintenance of nuclear facilities. Reliable nuclear theoretical model and evaluation data are needed in calculation. The secondary neutron double differential cross sections of 8.17, 11.5, 14.1 and 18 MeV neutron induced on iron were calculated with GEANT4 code. The secondary neutron double differential cross sections of 25.7,65, 100 and 150 MeV neutron induced on iron were calculated with TALYS and GEANT4 codes. Additionally,these calculation results were compared with experimental data. Research shows that, for the energy below 20 MeV,the ENDF/B-VIII.0 library is in good agreement with experimental data, and the BROND-3.1, CENDL-3.1,JENDL-4.0 u and JEFF-3.3 libraries show some discrepancies with experimental data. For the energy between 20 and 150 MeV, the calculation results of the BERT model and the TALYS code are in good agreement with experimental data. The calculation results of BIC and INCLXX models are different from experimental data. On the whole, further research is needed for the neutron evaluated nuclear data and nuclear reaction model.

关 键 词：GEANT4 TALYS 次级中子双微分截面 中子评价数据 理论模型 

分 类 号：O571.55[理学—粒子物理与原子核物理]