标题： N=Z 核 62Ga 中 T=0 和 T=1 带的转动结构 显示英文标题

标题： Rotational Structure of T=0 and T=1 bands in the N=Z Nucleus 62Ga

摘要： 研究了奇奇核62Ga中T=0和T=1带的转动行为，分别使用了球壳模型（实验室坐标系）和转动Nilsson-Strutinsky模型（内禀坐标系）。两种模型均很好地描述了现有的实验数据。壳层模型研究了自同标和同位旋配对在T=0和T=1带中的作用，作为角动量的函数。观察到的T=0带的反扭折被解释为具有不同变形的两种构型之间的未配对带交叉。这两种构型分别由2p-2h组成，并分别终止于I\pi=9 + 和I\pi=17 + 的旋转性质。计算了E2跃迁矩阵元和光谱学四极矩。从CNS计算结果（由壳层模型结果支持），建议T=0和T=1带的低自旋部分对应于三轴变形态，旋转分别发生在最短轴（正\gamma ）和中间轴（负\gamma ）上。在较低自旋时，壳层模型计算中使用的pf_{5/2}g_{9/2}构型空间被认为是足够的，而在反扭折以上，f_{7/2}变得更加重要。 显示英文摘要

摘要： The rotational behaviour of T=0 and T=1 bands in the odd-odd N=Z nucleus 62Ga is studied theoretically using the spherical shell model (laboratory frame) and the cranked Nilsson-Strutinsky model (intrinsic frame). Both models give a good description of available experimental data. The role of isoscalar and isovector pairing in the T=0 and T=1 bands as functions of angular momentum is studied in the shell model. The observed backbending in the T=0 band is interpreted as an unpaired band-crossing between two configurations with different deformation. The two configurations differ by 2p-2h and are found to terminate the rotational properties at I\pi=9+ and I\pi=17+, respectively. E2-decay matrix elements and spectroscopic quadrupole moments are calculated. From the CNS calculation, supported by shell model results, it is suggested that the low spin parts of the bands with T=0 and T=1 correspond to triaxially deformed states with the rotation taking place around the shortest axis (positive \gamma) and intermediate axis (negative \gamma), respectively. At lower spins the configuration space pf_{5/2}g_{9/2}, used in the shell model calculation, is found sufficient while also f_{7/2} becomes important above the backbending.