超重核合成时的驱动势与热熔合反应截面  

The driving potential and cross sections for synthesizing super heavy nuclei with hot fusion

作　　者：黄明辉[1] 甘再国[1] 范红梅[1] 苏朋源[1] 马龙[1] 周小红[1] 李君清[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《物理学报》2008年第3期1569-1575,共7页Acta Physica Sinica

基　　金：中国科学院知识创新工程重点方向性项目(批准号:KJCX2-SW-No17,KJCX-SYW-No2);国家自然科学基金(批准号:10505016,10475099,10775061,10575121);国家重点基础研究发展计划(973)项目(批准号:2007CB815000)资助的课题~~

摘　　要：在双核模型框架下,双核系统生成超重复合核的机理是由双核中的弹核的核子全部转移到靶核产生的,而核子转移是由双核系统驱动势确定的.对有的反应道,核子转移与中质比变化路径之间有比较复杂的关系.原则上动力学方程与驱动势都应该是中子和质子的二维显函数.为处理方便,采用与中质比相关的核子转移路径的选择来取驱动势,得到了接近实验值的超重核合成蒸发剩余截面.The dinuclear model of the formation mechanism of a superheavy compound nucleus assumes that when all nucleons of the projectile have been transferred in to the target nucleus the compound nucleus is formed. The nucleon transfer is determined by the driving potential. For some reaction channels, the relation between nucleon transfer and the evolution path of the neutron/ proton ratio is rather complicated. In principle, both the dynamical equation and the driving potential should be a twodimensional explicit function of the neutron and proton. For the sake of simplicity we calculated the driving potential by choosing the path of the nucleon transfer which is related to the nutron/proton ratio, and the calculated evaporation residue cross-sections to synthesize the superheavy nuclei are much closer to the experimental data.

关 键 词：超重核 驱动势 激发函数 热熔合 反应截面 

分 类 号：O571.6[理学—粒子物理与原子核物理]