近垒熔合机制的动力学研究  

Study on Dynamics of the Fusion Mechanism near Coulomb Barrier

作　　者：冯兆庆[1] 靳根明[1] 张丰收[2] 付芬[1] 黄熙[1] 

机构地区：[1]中国科学院近代物理研究所 [2]兰州重离子加速器国家实验室原子核理论中心

出　　处：《高能物理与核物理》2005年第12期1157-1161,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10475100)资助

摘　　要：通过考虑动力学中的壳效应,对同位旋相关的量子分子动力学模型做了进一步改进,并利用改进的量子分子动力学模型对近垒熔合机制做了动力学研究.对轻系统的熔合反应,改进的模型能够给出与实验结果一致的熔合激发函数,同时,对重系统的俘获截面也能给出与实验测量值基本一致的计算结果,尤其是对近垒或垒下区域也能作出很好的描述.作为对模型的进一步检验,对核一核相互作用势做了静态研究,并与亲近势的结果做了比较.The isospin dependent quantum molecular dynamics model has been further developed by considering shell effect and the fusion mechanism near Coulomb barrier is studied by using the improved model. For light reaction system, the fusion excitation function can be described very well by using the improved model, which is consistent with the experimental data. At the same time, the experimental capture cross section for heavy reaction system can be reproduced basically. Especially for the region near or below barrier, it can also be described reasonably by using the improved model. As a further test for the model, the nucleus-nucleus interaction potential is also calculated, and compared with the proximity potential as well.

关 键 词：壳效应 改进的同位旋相关的量子分子动力学模型 核-核作用势 熔合(俘获)截面 

分 类 号：O571.2[理学—粒子物理与原子核物理]