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Lifetimes of High Spin Yrast States in Odd-Proton Nucleus 131Pr |
| LI Guang-Sheng1;MENG Rui2;ZHU Li-Hua1;ZHANG Zhen-Long2;WANG Yue2;WANG Zhi-Min1;WEN Shu-Xian1;LU Jing-Bin2;ZHAO Guang-Yi2;LI Xian-Feng2;WEN Li-Jun2;ZHENG Yong-Nan1;ZHENG Yong3;LIU Yun-Zuo2;YUAN Guan-Jun1;YANG Chun-Xiang1 |
| 1China Institute of Atomic Energy, Beijing 102413
2Department of Physics, Jilin University, Changchun 130023
3Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
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| Cite this article: |
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LI Guang-Sheng, MENG Rui, ZHU Li-Hua et al 2003 Chin. Phys. Lett. 20 475-477 |
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Abstract Lifetimes of the high spin yrast states in the odd-proton nucleus 131Pr have been determined by analysing the Doppler broadened line shapes for the de-exciting γ-rays following the 116Sn(19F, 4n)131Pr reaction at a bombarding energy of 95 MeV. The transition quadrupole moments extracted from the measured lifetimes exhibit a considerable reduction near the rotational frequency of 0.42 MeV, at which the J(1) and J(2) moments of inertia indicate a band crossing. The experimental result demonstrates occurrence of the nuclear shape change induced by band crossing associated with the alignment of a pair of h11/2 protons.
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| Keywords:
21.10.Tg
23.20.-g
27.60.+j
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Published: 01 April 2003
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