关键词: 
Smoluchowski方程 /
超重核 /
同位素依赖

摘要: 利用二参量Smoluchowski方程计算了⁵⁴Fe+²⁰⁴Pb，⁵⁶Fe+²⁰⁶Pb，⁵⁸Fe+²⁰⁸Pb冷熔合和^32，34，36S+²³⁸U热熔合的复合核形成截面和蒸发残余截面， 结果清楚地显示出超重核合成截面随同位素的变化。 由于较低的入射道库仑位垒、 较低的不对称裂变谷中的条件鞍点和较小的中子分离能， 一般地说， 丰中子同位素的超重核形成截面明显增强。
The cross sections of the compound nucleus formation and e vaporation residue for the 54Fe+204Pb， 56Fe+206Pb， 58Fe+208Pb cold fusion and 32,34, 36S+238U hot fusion have been calculated by using a twoparameter Smoluchowski equation. Our results clearly show the isotope dependence of superheavy nucleus production. The formation cross sections of the neutronrich isotope are， generally speaking， obviously enhanced due to the lower Coloumb barrier ， lower height of the conditional saddlepoint， and smaller neutron separation energy.