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arXiv 1003.1229nucl-th
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近轴对称核八极和四极形变的描述:X(5)核150Nd和152Sm的八极振动

Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Octupole vibrations in the X(5) nuclei 150Nd and 152Sm

P. G. Bizzeti, A. M. Bizzeti-Sona

摘要:

在前一篇文章中介绍的模型,用于描述接近轴对称条件下的八极和四极自由度,被用来描述基于靠近U(5)到SU(3)相变临界点的原子核中的第一八极振动态的负宇称带。详细讨论了150 Nd和152 Sm的情况。这些核的正宇称能级以及带内E2跃迁都可以用X(5)模型合理地解释。通过对八极振动性质的简单假设,也可以以相当的精度描述负宇称扇区,而不改变对正宇称部分的描述。

英文摘要:

The model, introduced in a previous paper, for the description of the octupole and quadrupole degrees of freedom in conditions close to the axial symmetry, is used to describe the negative-parity band based on the first octupole vibrational state in nuclei close to the critical point of the U(5) to SU(3) phase transition. The situation of 150Nd and 152Sm is discussed in detail. The positive parity levels of these nuclei, and also the in-band E2 transitions, are reasonably accounted for by the X(5) model. With simple assumptions on the nature of the octupole vibrations, it is possible to describe, with comparable accuracy, also the negative parity sector, without changing the description of the positive-parity part.

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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