Signature inversion caused by shape change in ⁸⁴Rb

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• 作者：Shen ; Shuifa ; Gu ; Jiahui ; Shi ; Shuanghui ; Liu ; Jingyi ; Zhou ; Jianzhong ; Shen ; Wenqing
• 关键词：21.60.Cs ; 27.50.+e ; 21.10.Hw ; Projected shell model (PSM) ; Yrast state ; Quadrupole deformation
• 刊名：Physics Letters B
• 出版年：2003
• 出版时间：February 20, 2003
• 年：2003
• 卷：554
• 期：3-4
• 页码：115-120
• 全文大小：101 K

文摘

The angular momentum projected shell model (PSM) is applied to the nucleus ⁸⁴Rb. The results of theoretical calculations about the positive-parity yrast band with configuration πg_9/2νg_9/2 and the negative-parity yrast band with configuration π(p_3/2,f_5/2)νg_9/2 are compared with experimental data. The interpretation within the projected shell model shows that the signature inversion displayed in the positive-parity yrast band in this nucleus is a signal of a substantial quadrupole shape change with increasing spin where the nucleus evolves from a prolate shape at low spin through a triaxial shape to an oblate shape at high spin. In addition, we also specify the nuclear shape for these two bands.