论文标题
变形核中的低能量M1状态：自旋示波器还是自旋flip？
Low-energy M1 states in deformed nuclei: spin-scissors or spin-flip?
论文作者
论文摘要
低能$ M1 $状态的变形$^{164} $ dy和球形$^{58} $ ni在完全自洽的准准粒子随机相近似（QRPA）的框架内探索。主要关注轨道和旋转$ M1 $激发。将获得的结果与低能{\ it旋转刺激器} $ M1 $共振的预测进行了比较。分析了这种共振与低能自旋flip激励的可能关系。与最近的WFM研究有关，我们考虑了$^{164} $ dy中低能自旋芯状态的演变（从平衡值到球形极限）。简要讨论了张力力的效果。结果表明，在$^{164} $ dy中观察到的两组$ 1^+$状态在2.4-4 meV中观察到的是轨道$ m1 $强度的碎片，而不是出现集体旋转激素共振。通常，我们的计算不能确认这种共振的存在。
The low-energy $M1$ states in deformed $^{164}$Dy and spherical $^{58}$Ni are explored in the framework of fully self-consistent Quasiparticle Random-Phase Approximation (QRPA) with various Skyrme forces. The main attention is paid to orbital and spin $M1$ excitations. The obtained results are compared with the prediction of the low-energy {\it spin-scissors} $M1$ resonance suggested within Wigner Function Moments (WFM) approach. A possible relation of this resonance to low-energy spin-flip excitations is analyzed. In connection with recent WFM studies, we consider evolution of the low-energy spin-flip states in $^{164}$Dy with deformation (from the equilibrium value to the spherical limit). The effect of tensor forces is briefly discussed. It is shown that two groups of $1^+$ states observed at 2.4-4 MeV in $^{164}$Dy are rather explained by fragmentation of the orbital $M1$ strength than by the occurrence of the collective spin-scissors resonance. In general, our calculations do not confirm the existence of this resonance.
