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arXiv 1909.06992nucl-th
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核磁转动带的能量交错参数

Energy staggering parameters in nuclear magnetic rotational bands

Wu-Ji Sun, Jian Li

摘要:

给出了具有$M1$和$E2$跃迁性质的磁转动带的能量交错系统学,这些系统学与$A\sim80$、110、130和190质量区磁转动带的良好候选者的特征严格一致。这些带所表现出的关于随自旋增加而增加的交错参数的变化与剪切机制的半经典描述一致。此外,还讨论了后弯区或带终止附近的反常行为。取三个$N=58$同位素中具有相同构型的磁偶极带,以$^{103}$ Rh、$^{105}$ Ag和~ $^{107}$ In为例,给出了质子数接近$Z=50$时从手性旋转到磁旋转的转变。此外,本文还应用自洽的斜轴推转和主轴推转相对论平均场论研究了$^{105}$ Ag的偶极带转动机制。

英文摘要:

The systematics of energy staggering for the magnetic rotational bands with $M1$ and $E2$ transition properties strictly consistent with the features of good candidates of magnetic rotational bands in the $A\sim80$, 110, 130 and 190 mass regions are presented. The regularities exhibited by these bands concerning the staggering parameter which increases with increasing spin are in agreement with the semiclassical description of shears mechanism. In addition, the abnormal behaviours in the backbend regions or close to band termination have also been discussed. Taking the magnetic dipole bands with same configuration in three $N=58$ isotones, i.e., $^{103}$Rh, $^{105}$Ag, and~$^{107}$In, as examples, the transition from chiral rotation to magnetic rotation with the proton number approaching $Z=50$ is presented. Moreover, the self-consistent tilted axis cranking and principle axis cranking relativistic mean-field theories are applied to investigate the rotational mechanism in dipole band of $^{105}$Ag.

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