重离子碰撞复合体系碎化产生超重核可能性的探讨  

Investigation in Possibility of Producing Superheavy Fragments through Massive Nuclear Reactions at Low Energies

作　　者：吴锡真[1] 李祝霞[1] 王宁[1] 田俊龙[1] 赵凯[1] 张英逊[1] 欧立[1] 刘敏[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》2005年第4期329-333,共5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(G20000774)~~

摘　　要：讨论了通过重核碰撞形成的复合体系破裂产生超重核的问题。评述了两种主要的理论模型:即早期发展的在碎化理论框架下的量子涨落理论和本课题组尝试发展的微观输运理论模型。概括阐述了微观输运理论研究197Au+197Au,238U+238U和244Pu+244Pu等反应的主要结果,即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 composite system breaking up in massive nuclear reactions is investigated. Two main theoretical models, which are the quantum fluctuations within the fragmentation theory developed at 1980＇s 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 composite system and superheavy fragments, and the distribution of binding energy of Superheavy fragments are discussed for reactions of ^244Pu＋^244Pu, ^238U＋^238U, 197Au＋^197Au based on the improved quantum molecular dynamics model.

关 键 词：超重碎块 重核碰撞复合体系 量子涨落理论 微观输运理论 

分 类 号：O571.4[理学—粒子物理与原子核物理]