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arXiv 1002.0031nucl-th
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用Skyrme力研究超重核的Fission

Fission of super-heavy nuclei explored with Skyrme forces

N. Schindzielorz, J. Erler, P. Klüpfel, P. -G. Reinhard, G. Hager

摘要:

本文报道了在超重元素区(SHE),即Z=104-122的核中自发裂变寿命的大尺度测量。这是在Skyrme-Hartree-Fock模型的基础上完成的。使用四极约束计算轴对称裂变路径。自洽曲柄用于集体质量和相关的量子校正。实际隧穿概率由WKB近似估计。三个典型的Skyrme力被用来探讨结果的敏感性。在Z=104-108范围内的基准显示出可接受的一致性。一般的系统学很好地反映了Z/N=118/176区域衰变链的壳层稳定岛和从$α$ -衰变到裂变的交叉。

英文摘要:

We present a large scale survey of life-times for spontaneous fission in the regime of super-heavy elements (SHE), i.e. nuclei with Z=104-122. This is done on the basis of the Skyrme-Hartree-Fock model. The axially symmetric fission path is computed using a quadrupole constraint. Self-consistent cranking is used for the collective masses and associated quantum corrections. The actual tunneling probability is estimated by the WKB approximation. Three typical Skyrme forces are used to explore the sensitivity of the results. Benchmarks in the regime Z=104-108 show an acceptable agreement. The general systematics reflects nicely the islands of shell stabilization and the crossover from $α$-decay to fission for the decay chains from the region of Z/N=118/176.

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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