^(136)Xe+^(198)Pt多核子转移反应机制的理论研究  

Theoretical Study of the Mechanism of Multinucleon Transfer Reaction Xe+Pt

作　　者：蒋翔 王楠[1] JIANG Xiang;WANG Nan(College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China)

机构地区：[1]深圳大学物理与光电工程学院,广东深圳518061

出　　处：《原子核物理评论》2021年第1期17-23,共7页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11705118,11647026,11475115)。

摘　　要：如何生成丰中子重核是目前原子核物理领域的热点问题之一,多核子转移反应是生成丰中子重核的一种可行途径。本工作采用时间相关的Hartree-Fock(TDHF)方法研究了^(136)Xe+^(198)Pt在Ec.m.=645 MeV的多核子转移反应。对动力学过程中的核子转移、能量耗散、形变核的朝向效应等进行了细致的分析,并结合统计衰变模型GEMINI++处理初级碎片的退激发过程,计算了类弹核的同位素生成截面,并与实验结果进行了对比。结果表明,对于少量核子转移的产物截面,TDHF方法可以给出较好的描述;而对于较多核子转移生成的远离弹靶的产物截面,理论计算与实验结果有较大的偏差。最后,对这些偏差产生的原因进行了讨论。How to produce neutron-rich heavy nuclei is one of the hot topics in nuclear physics,multinucleon transfer reaction would be a possible route to synthesize these nuclei.The time-dependent Hartree-Fock(TDHF)theory is employed to study the multinucleon transfer reaction^(136)Xe+^(198)Pt at Ec.m.=645 MeV.The nucleon transfer process,energy dissipation and orientation of the deformed reactants on the reaction are investigated.The stateof-art statistical model GEMINI++is adopted to investigate the deexcitation process of the excited primary fragments.The secondary isotopic production cross sections of the projectile-like fragment are compared with the experimental data.The results indicate that the data of few transfer channels can be well reproduced by TDHF.Discrepancy is observed for large transfer channels and the possible reasons are discussed.

关 键 词：丰中子重核 多核子转移反应 TDHF方法 朝向效应 

分 类 号：O571.6[理学—粒子物理与原子核物理]