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arXiv 1409.3155nucl-th
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用转动惯量研究$^{282}$ Cn的Fission衰变

Fission decay of $^{282}$Cn studied using cranking inertia

D. N. Poenaru, R. A. Gherghescu

摘要:

迄今为止产生的超重核主要通过$α$发射和自发裂变衰变。计算的$α$衰变半衰期与实验数据在一个数量级内一致。对于自发裂变,理论和实验之间的差异可以高达十个数量级。分析了一种提高计算精度的方法,即采用基于转动惯量的作用量积分和采用双中心壳模型的宏微观方法计算的势垒。插图给出了$^{282}$ Cn,它有一个测量裂变半衰期。

英文摘要:

Superheavy nuclei produced until now are decaying mainly by $α$ emission and spontaneous fission. Calculated $α$ decay half-lives are in agreement with experimental data within one order of magnitude. The discrepancy between theory and experiment can be as high as ten orders of magnitude for spontaneous fission. We analyze a way to improve the accuracy by using the action integral based on cranking inertia and a potential barrier computed by the macroscopic-microscopic method with a two-center shell model. Illustrations are given for $^{282}$Cn which has a measured fission half-life.

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