关于重核强阻尼反应的研究  

Investigation on Strongly Damped Rreactions for Very Heavy Nuclei

作　　者：吴锡真[1] 田俊龙[1] 李祝霞[1] 王宁[1] 赵凯[1] 张英逊[1] 欧立[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《原子核物理评论》2006年第4期405-408,共4页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10235030;10235020);国家重点基础研究发展规划资助项目(G2000077400)~~

摘　　要：讨论了重核碰撞形成巨复合体系破裂的强阻尼反应产生超重核的问题。评述了两种主要的理论模型:唯象的多维朗之万模型和本课题组发展的微观输运理论模型。概括阐述了微观输运理论研究反应197Au+197Au,238U+238U和244Pu+244Pu等的主要结果。给出了反应中产生的超重碎块的几率与入射能的关系,复合体系和超重碎块的衰变机制以及所形成的超重碎块的结合能和形状的分布。In this paper, the possibility of producing superheavy fragments through strongly damped reactions in very massive nuclear collisions is investigated. Two theoretical models, which are the phenomenologically multi-dimensional Langevin equation model and improved quantum molecular dynamics model developed recently by Our group, are briefly reviewed. The dependence of the production probability of superheavy fragments on the incident energy, the decay mechanism Of the composite systems and superheavy fragments, and the distributions of .the binding energy and shapes of superheavy fragments are discussed for reactions of ^244 pu＋^244 Pu, ^238 U＋^238U, ^197 Au＋^197 Au based on the improved quantum molecular dynamics model.

关 键 词：超重碎块 重核碰撞巨复合体系 多维朗之万模型 微观输运理论 

分 类 号：O571.4[理学—粒子物理与原子核物理]