低能重离子碰撞产生超重核动力学机制(英文)  

Dynamics in Production of Superheavy Nuclei in Low-energy Heavy-ion Collisions

作　　者：冯兆庆[1] 靳根明[1] 李君清[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子核物理评论》2011年第1期1-22,共22页Nuclear Physics Review

基　　金：National Natural Science Foundation of China(10805061,10975064);Special Foundation of President Fund ;West Doctoral Project of Chinese Academy of Sciences Major State Basic Research Development Program of China(2007CB815000)~~

摘　　要：总结了描述重系统碰撞形成超重核的主要理论模型进展。基于两类反应机制,即熔合蒸发反应和大质量阻尼反应,对产生超重核的物理过程进行了讨论。分析了超重核形成过程中碰撞系统的俘获、复合核的形成及蒸发退激描述存在的问题。基于双核模型分析了合成冷熔合反应和48Ca诱发全熔合反应之间的超重新核素的可能性。利用锕系核碰撞的转移反应产生子壳N=162附件丰中子重核的可行性,研究了壳效应对丰中子核素产生的影响。进一步讨论了将来基于丰中子强流放射性束合成超重核的可行性。We present a review of the recent progress of theoretical models on the description of the superheavy nucleus formation in heavy ion collisions.Two sorts of reactions that are the fusion-evaporation mechanism and the massive damped collisions to produce superheavy nuclei are discussed.Problems and further improvements of the capture of colliding partners,the formation of compound nucleus and the de-excitation process are pointed out.Possible combinations for the synthesis of the superheavy nuclei in between the products of the cold fusion and ^48Ca induced reactions are proposed by the calculations based on the dinuclear system model and also compared with other approaches.The synthesis of neutron-rich heavy isotopes near sub-shell closure N=162 via transfer reactions in the damped collisions of two actinides and the influence of shell closure on the production of heavy isotopes are investigated.Prospective possibility to reach superheavy nuclei near N=184 via neutron-rich radioactive beams of high intensity in the future is discussed.

关 键 词：超重核 熔合蒸发反应 阻尼碰撞 熔合动力学 

分 类 号：O572.33[理学—粒子物理与原子核物理]