超重核合成的同位素依赖探讨

原子核物理评论 , 2006, 23(4): 419-423. doi: 10.3969/j.issn.1007-4627.2006.04.013

超重核合成的同位素依赖探讨

刘祖华 ^1, , 包景东 ^2,

1.

2.

基金项目: 国家自然科学基金(10235020;10235030)

关键词： Smoluchowski方程 , 超重核 , 同位素依赖

On Isotope Dependence of Superheavy Nucleus Production

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.

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