利用最近发展起来的两步模型分析重离子核反应48Ca+254Es的熔合过程.在这个模型中,熔合过程被分为前后独立的两个过程,即粘连过程和形成过程.本研究组计算了对应的粘连概率和形成概率,并结合适用于蒸发过程的统计蒸发模型,计算了该反应合成119号超重元素的剩余截面,即当Elab=250.2 MeV时,得到最大剩余截面为0.7 pb.
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