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arXiv 1111.1961nucl-th
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通过$^{293}$ 118的$α$衰变链研究超重元素区的结构效应

Structure effects in the region of superheavy elements via the $α$-decay chain of $^{293}$118

Raj K. Gupta, Sushil Kumar, Rajesh Kumar, M. Balasubramaniam, W. Scheid

摘要:

本文用我们之一(RKG)的预制团簇模型(PCM)计算了在伯克利冷聚变实验$^{208}$ Pb($^{86}$ Kr,1 n)中首次提出的、现已撤回的$^{293}$ 118的$α$ -衰变链。此外,$α$ -粒子的可能分支到更重的集团衰变的所有父母在这个链中的计算是第一次。计算的$α$ -衰变的Q值、穿透率和预形成因子表明,Z=114,N=171的$^{285}$ 114核是一个幻核,这可能是由于Z=114的幻性,也可能是由于N=172的幻性,或者是由于两者的幻性。在某些相对论平均场计算中,N=172被认为是一个幻数,但Z=120。计算的团簇衰变指向新的有趣的可能性$^{14}$ C衰变的$^{281}$ 112父,产生一个(合理)变形Z=106,N=161,$^{267}$ 106女儿(N=162现在被确定为变形的魔壳层)或双重魔术$^{48}$钙团簇发射的任何母核在$α$ -衰变链。显然,这些是未来实验令人兴奋的新方向。

英文摘要:

The $α$-decay chain of $^{293}$118, first proposed in the Berkeley cold fusion experiment $^{208}$Pb($^{86}$Kr,1n) and now retracted, is calculated by using the preformed cluster model (PCM) of one of us (RKG). Also, the possible branchings of $α$-particles to heavier cluster decays of all the parents in this chain are calculated for the first time. The calculated Q-values, penetrabilities and preformation factors for $α$-decays suggest that the $^{285}$114 nucleus with Z=114, N=171 is a magic nucleus, either due to the magicity of Z=114, or of N=172 or of both. The N=172 is proposed to be a magic number in certain relativistic mean-field calculations, but with Z=120. The calculated cluster decays point to new interesting possibilities of $^{14}$C decay of the $^{281}$112 parent, giving rise to a (reasonably) deformed Z=106, N=161, $^{267}$106 daughter (N=162 being now established as the deformed magic shell) or to a doubly magic $^{48}$Ca cluster emitted from any of the parent nucleus in the $α$-decay chain. Apparently, these are exciting new directions for future experiments.

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。

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