低能重离子碰撞产生超重核动力学机制

冯兆庆; 靳根明; 李君清

低能重离子碰撞产生超重核动力学机制

中国科学院近代物理研究所,甘肃,兰州,730000

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

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.

关键词:

Abstract: 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 fusionevaporation mechanism and the massive damped collisions toproduce 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 "Ca induced reactions are proposed by the calculations based on thedinuclear 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.

低能重离子碰撞产生超重核动力学机制

中国科学院近代物理研究所,甘肃,兰州,730000

关键词:

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

中国科学院近代物理研究所,甘肃,兰州,730000

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