重离子反应中质子与中子转移对超重元素合成的影响  

Effect of Proton and Neutron Transfer on Synthesizing Superheavy Elements in Heavy Ion Reactions

作　　者：黄明辉[1,2] 甘再国[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,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《原子核物理评论》2008年第4期327-331,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(1047599,10505016,10775061);中国科学院知识创新工程重点方向性项目(KJCX2-SW-No17,KJCX-SYW-No2);国家重点基础研究发展规划资助项目(2007CB815000)~~

摘　　要：研究了采用类弹碎片质量数为变量的一维(1D)主方程(ME)描述重离子熔合反应时的受限制条件,建立了以类弹碎片中子和质子数为独立变量的二维(2D)ME,并采用分步差分格式法数值解(2D)ME得到了熔合几率。新的方法适用于研究任何弹靶组合系统,给出了与实验符合更好的结果,为寻求合成超重核的反应道提供了更为宽阔的选择空间。同时也研究了弹靶的不同同位旋组合对复合核形成截面的影响。The limitation of the one dimensional master equation with the mass number of project-like fragment as the variable is discussed. A two-dimensional master equation with neutron and proton numbers of the project-like fragment as variables is set up, and solved numerically by means of a two step difference scheme to obtain fusion probability. The new equation is suitable for studying fusion reactions with any projectile-target combination, and can better fit the experimental data, so that it can provide a large proba- bility to choose the reaction system for synthesizing a certain superheavy nucleus. The influence of projec-tile-target combinations with different isospins on the cross-sections of compound nuclei is studied.

关 键 词：超重核 熔合蒸发反应 驱动势 主方程 

分 类 号：O571.6[理学—粒子物理与原子核物理]