标题： 基于3D-CHFB的GCM方法研究$^{182}$的能带结构 显示英文标题

标题： Band Structures of $^{182}$ Os Studied by GCM based on 3D-CHFB

摘要： 研究了$^{182}$Os 的能带结构特性，通过基于三维转动自洽解的粒子数和角动量约束生成坐标法（GCM）计算。从最低 GCM 解波函数的分析中，我们确认该原子核在其基态序列中表现出倾斜转动运动，至少在目前采用的配对 + 四极相互作用哈密顿参数集下如此。对其他 GCM 解行为的详细检查揭示出该原子核可能存在能带交叉现象的迹象。此外，在计算过程中，我们还发现沿$J=18\hbar$球体本初子午线存在一条新的势能曲线。沿着这条新解路径，质子和中子间隙参数的特征发生了互换：即$\Delta_p$几乎消失，而$\Delta_n$增长至接近主轴旋转（PAR）对应的有限值。在 PAR 点处的新解曲线上的状态表现出与 yrare$s$能带状态几乎相同的特征，该 yrare 能带在我们的计算中位于$g$能带之上。这一事实表明，质子和中子配对之间可能通过摇摆运动发生一种新的跷跷板振动模式。 该模式被认为在回弯区域连接了$g$带态和$s$带态。 显示英文摘要

摘要： Band structure properties of $^{182}$Os are investigated through a particle number and angular momentum constrained generator coordinate(GCM) calculation based on self-consistent three-dimensional cranking solutions. From the analysis of the wave function of the lowest GCM solution, we confirm that this nucleus shows a tilted rotational motion in its yrast states, at least with the present set of force parameters of the pairing-plus-quadrupole interaction Hamiltonian. A close examination of behavior of other GCM solutions reveals a sign of a possible occurrence of multi-band crossing in the nucleus. Furthermore, in the course of calculations, we have also found a new potential curve along the prime meridian on the globe of the $J=18\hbar$ sphere. Along this new solution the characters of proton and neutron gap parameters get interchanged. Namely, $\Delta_p$ almost vanishes while $\Delta_n$ grows to a finite value close to the one corresponding to the principal axis rotation(PAR). A state in the new solution curve at the PAR point turns out to have almost the same characteristic features of an yrare $s$-band state which gets located just above the $g$-band in our calculation. This fact suggests a new type of seesaw vibrational mode of the proton and the neutron pairing, occurring through a wobbling motion. The mode is considered to bridge the $g$-band states and the $s$-band states in the backbending region.