arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1205.5986nucl-th
收藏

A=158-168核大形变高自旋带的解释

Interpretation of the large-deformation high spin bands in selected A=158-168 nuclei

A. Kardan, I. Ragnarsson, H. Miri-Hakimabad, L. Rafat-Motevali

摘要:

用组态约束的Cranked Nilsson-Strutinsky(CNS)模型分析了168 Hf核的高自旋转动带和Lu核的三轴带.特别注意的是向上倾斜的挤出机轨道。还考虑了与三轴形状相对应的带之间的相对排列,包括158 Er中的yraast超高自旋带。这一比较表明,后者带是由围绕中间轴的旋转形成的。此外,CNS方法的标准近似进行了研究,表明引入的错误,由忽略的离壳矩阵元素和9振荡器壳(N_{max} =8)的截止相比,其他的不确定性基本上可以忽略不计。另一方面,完全包含十六极自由度更重要;例如,它导致168 Hf的TSD区域中的总能量减少约500 keV。

英文摘要:

The high-spin rotational bands in 168Hf and the triaxial bands in Lu nuclei are analyzed using the configuration-constrained Cranked Nilsson-Strutinsky (CNS) model. Special attention is given to the up-sloping extruder orbitals. The relative alignment between the bands which appear to correspond to triaxial shape is also considered, including the yrast ultra-high spin band in 158Er. This comparison suggests that the latter band is formed from rotation around the intermediate axis. In addition, the standard approximations of the CNS approach are investigated, indicating that the errors which are introduced by the neglect of off-shell matrix elements and the cut-off at 9 oscillator shells (N_{max}=8) are essentially negligible compared to other uncertainties. On the other hand, the full inclusion of the hexadecapole degree of freedom is more significant; for example it leads to a decrease of the total energy of ~ 500 keV in the TSD region of 168Hf.

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。

↑