正常形变带5211/2的ΔI=1颤动

ΔI=1 Staggering in Normally Deformed Band 1/2

摘要: 系统分析了A≈ 170区正常形变带 5 2 11/ 2 - 中的ΔI =1颤动现象 .根据旋称伙伴带的跃迁能量提取Δ2 Eγ(I) =Eγ(I) +Eγ(I- 2 ) / 2 -Eγ(I - 1)值 ,表现出旋称相关的规则上下颤动 .其颤动幅度在低自旋端约为 5 0keV ,而后随自旋而增大或减小 ,大体呈抛物线形 .利用改进的ab公式 ,提取了相关的脱耦合系数 .运用Nilsson波函数 ,探讨了原子核集体哈密顿量中高阶微扰项的可能形式 .

Abstract: The ΔI=1 staggering phenomenon has been investigated systematically for the normally deformed bands in the odd-A rare-earth nuclei. By extracting the values of Δ 2 E γ(I)=E γ(I)+E γ(I-2)/2-E γ(I-1) from the transition energies in a pair of signature partner bands, regular signature- and spin-dependent zigzag patterns are explored in a series of the neutron ↓ bands. The staggering amplitude varies with spin roughly as a parabola-like curve, the same as the behavior observed in the odd mass superdeform...