近日，华东师范大学的陈启博及其研究团队取得一项新进展。经过不懈努力，他们揭示三轴转子加上单个准粒子的摆振运动过程。相关研究成果已于2024年3月15日在国际知名学术期刊《中国物理C》上发表。

该研究团队运用粒子-转子模型，深入探究了由三轴转子与单个准粒子构成的系统的摆振运动特性。他们详细研究了能量谱、摆振频率、电磁跃迁概率、g因子、角动量分量、自旋相干态图以及静态四极矩等关键指标。这些研究聚焦于费米表面从最低的h_11/2轨道到最高轨道的跃迁过程。随着费米表面的逐渐增大，摆振模式发生了显著的变化。

起初，摆振模式主要表现为围绕原子核短轴的横向旋转。然而，随着费米曲面的进一步增大，摆振模式逐渐转变为围绕中间轴的纵向旋转。最终，它完全转变为绕长轴的横向旋转。值得注意的是，当总角动量在γ=20°处增加时，长轴横向模式的稳定性相较于短轴上的对应模式有所降低。

附：英文原文

Title: Wobbling motion for a triaxial rotor plus a single quasiparticle

Author: Si-Hua Li, Hua-Ming Dai, Qi-Bo Chen, Xian-Rong Zhou

Issue&Volume: 2024-03-15

Abstract: Wobbling motion in a system comprising a triaxial rotor and a single quasiparticle is studied employing the particle-rotor model. The energy spectra, wobbling frequencies, electromagnetic transition probabilities, g-factors, angular momentum components, spin coherent state maps, and static quadrupole moments are investigated. These investigations were conducted with regard to the Fermi surface transitioning from the lowest h_11/2 orbit to the highest one. As the Fermi surface increases, notable transformations occur in the wobbling mode. Initially, the mode exhibits a transverse revolution around the short axis of the nucleus. However, as the Fermi surface continues to increase, the mode gradually shifts to a longitudinal revolution around the intermediate axis. Eventually, it transitions to a transverse revolution around the long axis. Notably, the stability of the long axis transverse mode diminishes relative to its counterpart along the short axis as the total angular momentum increases at γ=20°.

DOI: 10.1088/1674-1137/ad18d2

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad18d2