基于裂变的随机模型,研究了能级密度参数在鞍点与其基态处的比值af/an在热核衰变过程中的作用.计算表明,af/an的大小能显著影响蒸发剩余截面及其自旋分布的大小以及裂变过程中热核的耗散行为.发现,能级密度参数对激发能的依赖性af/an(E*)能改变断点处的激发能对摩擦强度的敏感性.最后指出了af/an随E*的变化对超重核的稳定性和散裂反应退激阶段描述的意义.
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