摘要
运用改进的量子分子动力学(ImQMD)模型嫁接GEMINI统计衰变模型对400 AMeV^(36)Ar与C、Al、Cu、Pb的弹核碎裂反应截面的奇偶效应进行了理论分析。分析结果表明,弹核碎裂电荷反应截面的奇偶效应产生在初级碎块的退激发过程中,而且退激发过程中的对能在奇偶效应的产生中起着重要作用。如果不考虑对能,弹核碎裂电荷反应截面的奇偶效应将消失。同时由于对能的作用使得弹核碎裂的中子反应截面也表现出明显的奇偶效应。
The improved quantum molecular dynamics(ImQMD) model plus the GEMINI statistical decay model are used to analyze the odd-even effect of fragmentation cross sections for reactions ^(36)Ar beams on C,Al,Cu,Pb targets at 400 MeV.The result shows that the odd-even effect is appeared in the de-excitation process of primary fragments,and the pairing energy plays an important role.The odd-even effect of fragmentation cross sections disappears when the pairing energy is removed from the de-excitation process.The odd-even effect in neutron of fragmentation cross section is significantly.
作者
程锦霞
张东海
李俊生
CHENG Jinxia;ZHANG Donghai;LI Junsheng(The Key Laboratory of Physics and Photoelectric information Functional Materials,North Minzu University,Yinchuan 750021,China;College of Electrical and Information Engineering,North Minzu University,Yinchuan 750021,China;Institute of Modern Physics,Shanxi Normal University,Linfen 041004,Shanxi,China)
出处
《原子核物理评论》
CAS
CSCD
北大核心
2020年第3期621-625,共5页
Nuclear Physics Review
基金
国家自然科学基金资助项目(11565001)。
关键词
弹核碎裂
奇偶效应
对能
fragmentation
odd-even effect
pairing energy
