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arXiv 2209.04718nucl-thnucl-ex
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$γ$的微观方面-原子核中的柔软性

Microscopic aspects of $γ$-softness in atomic nuclei

Nazira Nazir, S. Jehangir, S. P. Rouoof, G. H. Bhat, J. A. Sheikh, N. Rather, S. Frauendorf

摘要:

基于多准粒子位形空间的变形平均场图像,采用三轴投影壳模型方法研究了原子核中观测到的$γ$软度(核形状的三轴性参数$γ$的涨落)的微观起源.它表明,准粒子激发的耦合驱动系统从$γ$ -刚性到$γ$ -软模式。作为$γ$ -软核的说明性例子,已经对$^{104}$ Ru核进行了详细的研究。实验能量和大量的测量$E2$矩阵元素可用于此核的复制相当准确。计算的$E2$矩阵元素的形状不变分析阐明了$^{104}$ Ru的$γ$ -软性质。

英文摘要:

The microscopic origin of the $γ$-softness (fluctuations in the triaxiality parameter $γ$ of the nuclear shape) observed in atomic nuclei is studied in the framework of the triaxial projected shell model approach, which is based on the deformed mean-field picture with multi-quasiparticle configuration space. It is demonstrated that the coupling to quasiparticle excitations drives the system from a $γ$-rigid to a $γ$-soft pattern. As an illustrative example for a $γ$-soft nucleus, a detailed study has been performed for the $^{104}$Ru nucleus. The experimental energies and a large sample of measured $E2$ matrix elements available for this nucleus are reproduced quite accurately. The shape invariant analysis of the calculated $E2$ matrix elements elucidates the $γ$-soft nature of $^{104}$Ru.

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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