arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.1956nucl-th
收藏

通过重核团簇衰变研究壳层闭合效应

Shell closure effects studied via cluster decay in heavy nuclei

Sushil Kumar, Ramna, Rajesh Kumar

摘要:

研究了原子核壳层闭合效应通过原子团衰变的影响。在这种情况下,我们利用了Gupta和合作者基于量子力学碎裂理论的预制团簇模型($PCM$)。团簇放射性的关键点是它涉及母核和子核的密壳效应的相互作用。母体的小半衰期表示壳稳定的子体,长半衰期表示母体对衰变的稳定性。在迄今所观察到的反式铅核的团簇衰变中,最终产物是双魔铅或其近邻。有了这个想法,我们就扩展了原子团簇放射性的概念。我们研究了不同核的衰变,其中锆总是作为子核,这是非常有名的变形核。团簇衰变和$α$衰变的分支比也研究了各种核,导致魔术或几乎双魔术的子核。计算的团簇衰变半衰期与观测数据吻合良好。首次预测了$^{218}U$核中团簇衰变的可能性。

英文摘要:

The effects of shell closure in nuclei via the cluster decay is studied. In this context, we have made use of the Preformed Cluster Model ($PCM$) of Gupta and collaborators based on the Quantum Mechanical Fragmentation Theory. The key point in the cluster radioactivity is that it involves the interplay of close shell effects of parent and daughter. Small half life for a parent indicates shell stabilized daughter and long half life indicates the stability of the parent against the decay. In the cluster decay of trans lead nuclei observed so far, the end product is doubly magic lead or its neighbors. With this in our mind we have extended the idea of cluster radioactivity. We investigated decay of different nuclei where Zirconium is always taken as a daughter nucleus, which is very well known deformed nucleus. The branching ratio of cluster decay and $α$-decay is also studied for various nuclei, leading to magic or almost doubly magic daughter nuclei. The calculated cluster decay half-life are in well agreement with the observed data. First time a possibility of cluster decay in $^{218}U$ nucleus is predicted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑