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Prog. Theor. Phys. Vol. 111 No. 5 (2004) pp. 721-731

[ Full Text PDF : FREE ACCESS (163K) ]

On the Mechanism of Signature Inversion in the Doubly Odd Nuclei 80, 82Rb

Shuifa Shen,1,2 Jiahui Gu,1 Wenqing Shen,1 Zheng Xing1,3 and Zhiyuan Zhu1

1Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
2CCAST (World Lab.), P. O. Box 8730, Beijing 100080, People's Republic of China
3Department of Modern Physics, Lanzhou University, Lanzhou 730000, People's Republic of China

(Received November 30, 2003)

Abstract:

Several mechanisms have been proposed for signature inversion in the structure of A ∼80 odd-odd nuclei, but the corresponding theoretical calculations have not been conclusive. In the present work, the angular momentum projected shell model (PSM) is applied to the study of the nuclei 80, 82Rb. The results of the calculations regarding the positive parity yrast band for the configuration πg9/2 ⊗νg9/2 and the negative parity yrast band for the configuration π(p1/2 or p3/2 or f5/2) ⊗νg9/2 are compared with experimental data. According to the interpretation provided by the projected shell model, the signature inversion displayed in the positive parity yrast band for these nuclei is a signal of a substantial quadrupole shape change that takes place with increasing spin: The nucleus evolves from a prolate shape at low spin through a triaxial shape to an oblate shape at high spin. In addition, we specify the nuclear shapes of these two bands in these two nuclei.


URL : http://ptp.ipap.jp/link?PTP/111/721/
DOI : 10.1143/PTP.111.721

[ Full Text PDF : FREE ACCESS (163K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 128 No. 2 (2012) pp. 363-371 :
    Onset of Possible Octupole Deformation in Rotational 106,108Te Nuclei
    Hua-Lei Wang, Hong-Liang Liu, Fu-Rong Xu and Chang-Feng Jiao

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