摘要
General Fission(GEF)模型是描述裂变过程的一种半经验模型,它运用了量子力学和统计力学中的物理概念,并结合经验信息调整出了一组适用于不同裂变系统的参数,可以对大量原子核的裂变可观测量给出可靠的预测.本工作使用GEF模型计算了233U中子诱发裂变产额的质量分布.结果表明,随着入射中子能量增加,对称裂变贡献逐渐增大,非对称裂变贡献逐渐减小;考虑了多次机会裂变,(n,f)裂变道相对贡献随着入射中子能量增加逐渐降低,而其他裂变道贡献增加;裂变产物的产额能量变化趋势与其在质量分布上的不同位置有关.
The General Fission(GEF)model is a semi-empirical model describing fission process,which combines physical concepts from quantum mechanics and statistical mechanics with specific experimental information to adjust a set of parameters suitable for different fission systems and gives reliable predictions for essentially all fission observables of a broad range of fissioning nuclei.In this work,the mass distributions of 233U neutron-induced fission are calculated using the GEF model.The results show that with the increase of incident neutron energy,the contribution of symmetric fission channel increases gradually,and the asymmetric fission channel decreases.Detailed analysis of the fragment mass distribution is performed by taking multi-chance fission into account.The contribution of(n,f)fission channel gradually decreases with the increase of incident neutron energy,while the other fission channels increases.The variation trend of the yield energy-dependence is related to the position located on the mass distribution.
作者
郝艺伟
董国香
王小保
王华磊
舒能川
陈永静
刘丽乐
HAO YiWei;DONG GuoXiang;WANG XiaoBao;WANG HuaLei;SHU NengChuan;CHEN YongJing;LIU LiLe(School of Physics and Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Science,Huzhou University,Huzhou 313000,China;Key Laboratory of Science and Technology on Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China The General Fission(GEF)model is a semi-empirical model)
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2019年第12期96-102,共7页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:11605054,U1732138,11505056,11847315,11790320,11790323,11790325,11675148)
河南省高等学校青年骨干教师(编号:2017GGJS008)
郑州大学物理学科推进计划(编号:32410017)资助项目
