Xu F F, Wang Y K, Wang Y P, Ring P, Zhao P W
State Key Laboratory of Nuclear Physics and Technology, School of Physics, <a href="https://ror.org/02v51f717">Peking University</a>, Beijing 100871, China.
<a href="https://ror.org/02kkvpp62">Physik-Department der Technischen Universität München</a>, D-85748 Garching, Germany.
Phys Rev Lett. 2024 Jul 12;133(2):022501. doi: 10.1103/PhysRevLett.133.022501.
The rotational properties of the transfermium nuclei are investigated in the full deformation space by implementing a shell-model-like approach in the cranking covariant density functional theory on a three-dimensional lattice, where the pairing correlations, deformations, and moments of inertia are treated in a microscopic and self-consistent way. The kinematic and dynamic moments of inertia of the rotational bands observed in the transfermium nuclei ^{252}No, ^{254}No, ^{254}Rf, and ^{256}Rf are well reproduced without any adjustable parameters using a well-determined universal density functional. It is found for the first time that the emergence of the octupole deformation should be responsible for the significantly different rotational behavior observed in ^{252}No and ^{254}No. The present results provide a microscopic solution to the long-standing puzzle on the rotational behavior in No isotopes, and highlight the risk of investigating only the hexacontetrapole (β_{60}) deformation effects in rotating transfermium nuclei without considering the octupole deformation.
通过在三维晶格的推转协变密度泛函理论中采用类似壳模型的方法，在全形变空间中研究了超重核的转动性质，其中对配对关联、形变和转动惯量进行了微观且自洽的处理。使用一个确定的通用密度泛函，在没有任何可调参数的情况下，很好地再现了在超重核(^{252}No)、(^{254}No)、(^{254}Rf)和(^{256}Rf)中观测到的转动带的运动学和动力学转动惯量。首次发现八极形变的出现应是导致在(^{252}No)和(^{254}No)中观测到的显著不同转动行为的原因。目前的结果为关于(No)同位素转动行为的长期谜题提供了一个微观解决方案，并突出了在研究转动超重核时仅考虑十六极（(\beta_{60})）形变效应而不考虑八极形变的风险。
