Calculation of Yrast Bands for Odd-Odd Nuclei <SUP>80,82</SUP>Rb in A≈80 Mass Region

SHEN Shui-Fa; GU Jia-Hui; SHEN Wen-Qing

Chinese Physics C> 2004, Vol. 28> Issue(3) : 274-279

Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region

Shanghai Institute of Nuclear Research,The Chinese Academy of Sciences,Shanghai 201800,China

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Several mechanisms have been proposed for the signature inversion in the structure of A≈80 odd-odd nuclei, but the theoretical calculations have not been conclusive. In this work, the angular momentum projected shell model (PSM) is applied to the nuclei ^80,82Rb. The results of theoretical calculations about the positive-parity yrast band with configuration πg_9/2⊙νg_9/2 and the negative-parity yrast band with configuration π(p_1/2 or p_3/2 or f_5/2)⊙νg_9/2 are compared with experimental data, especially, the mechanism of the signature inversion in the positive-parity yrast band is discussed. The interpretation within the projected shell model shows that the signature inversion displayed in the positive-parity yrast band in these nuclei 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 in these two unclei, respectively.

References

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SHEN Shui-Fa, GU Jia-Hui and SHEN Wen-Qing. Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region[J]. Chinese Physics C, 2004, 28(3): 274-279.

SHEN Shui-Fa, GU Jia-Hui and SHEN Wen-Qing. Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region[J]. Chinese Physics C, 2004, 28(3): 274-279. shu

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Received: 2003-07-09
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region

Corresponding author: SHEN Shui-Fa,

Shanghai Institute of Nuclear Research,The Chinese Academy of Sciences,Shanghai 201800,China

Received Date: 2003-07-09

Accepted Date: 1900-01-01

Available Online: 2004-03-05

Abstract: Several mechanisms have been proposed for the signature inversion in the structure of A≈80 odd-odd nuclei, but the theoretical calculations have not been conclusive. In this work, the angular momentum projected shell model (PSM) is applied to the nuclei ^80,82Rb. The results of theoretical calculations about the positive-parity yrast band with configuration πg_9/2⊙νg_9/2 and the negative-parity yrast band with configuration π(p_1/2 or p_3/2 or f_5/2)⊙νg_9/2 are compared with experimental data, especially, the mechanism of the signature inversion in the positive-parity yrast band is discussed. The interpretation within the projected shell model shows that the signature inversion displayed in the positive-parity yrast band in these nuclei 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 in these two unclei, respectively.

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Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region

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Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region

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Calculation of Yrast Bands for Odd-Odd Nuclei 80,82Rb in A≈80 Mass Region

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Calculation of Yrast Bands for Odd-Odd Nuclei 80,82Rb in A≈80 Mass Region

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Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region

Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region