重离子反应中质子与中子转移对超重元素合成的影响

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 probability to choose the reaction system for synthesizing a certain superheavy nucleus. The influence of projectile target combinations with different isospins on the cross sections of compound nuclei is studied.

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

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 probability to choose the reaction system for synthesizing a certain superheavy nucleus.The influence of projectile-target combinations with different isospins on the cross-sections of compound nuclei is studied.