论文标题
$^{166} $ er及其Bohr模型实现的三轴刚度
Triaxial rigidity of $^{166}$Er and its Bohr-model realization
论文作者
论文摘要
$^{166} $ er的低洼旋转带的三轴性质是从Bohr Hamiltonian的角度出现的，并且是从Monte Carlo Shell模型的众多Ferrimion计算中提出的，并通过投影限制了Hartree-Fock方法。这些乐队最近提出的小说图片提出了这些频段的明确三轴形状，与传统的观点与pr齐的地面谱带和$γ$振动的兴奋频段相比。激发水平的能量和E2跃迁可以通过Bohr Hamiltonian和多个Fermion方法很好地描述，尽管在壳模 - 模型波函数中发生了某些波动，但相当刚性三方相当刚性的三轴性起着至关重要的作用。基于投影的势能表面，我们展示了三轴刚度如何显示出来以及三轴性的柔软性暗示。简要讨论了所谓的双$γ$ - phonon状态的激发。
The triaxial nature of low-lying rotational bands of $^{166}$Er is presented from the viewpoint of the Bohr Hamiltonian and from that of many-fermion calculations by the Monte Carlo shell model and the constrained Hartree-Fock method with projections. A recently proposed novel picture of those bands suggests definite triaxial shapes of those bands, in contrast to the traditional view with the prolate ground-state band and the $γ$-vibrational excited band. Excitation level energies and E2 transitions can be described well by the Bohr Hamiltonian and by the many-fermion approaches, where rather rigid triaxiality plays vital roles, although certain fluctuations occur in shell-model wave functions. Based on the potential energy surfaces with the projections, we show how the triaxial rigidity appears and what the softness of the triaxiality implies. The excitation to the so-called double $γ$-phonon state is discussed briefly.
