High-spin states and collective oblate bands in the odd-odd Pr138 nucleus

M. L. Li, S. J. Zhu, X. L. Che, Y. N. Yu, Y. J. Chen, H. B. Ding, L. H. Zhu, X. G. Wu, S. X. Wen, C. Y. He, X. Z. Cui, and Y. Liu
Phys. Rev. C 75, 034304 – Published 14 March 2007

Abstract

High-spin states in the odd-odd Pr138 nucleus were reinvestigated with the reaction Te128(N14,4n) at a beam energy of 64 MeV. Six collective bands were observed, and two of them were newly identified. For the πh11/2νh11/2 band, high-spin states are followed up to Iπ=16+. The spin values for this band have been reassigned based on the systematical comparison with the neighboring nuclei. The observed band crossing is proposed to be due to the alignment of protons, and the signature inversion with the neutron number changing in La and Pr isotopes has been discussed. The other five collective bands are proposed to be based on oblate deformation with γ~60°.

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  • Received 6 July 2006

DOI:https://doi.org/10.1103/PhysRevC.75.034304

©2007 American Physical Society

Authors & Affiliations

M. L. Li1, S. J. Zhu1,*, X. L. Che1, Y. N. Yu1, Y. J. Chen1, H. B. Ding1, L. H. Zhu2, X. G. Wu2, S. X. Wen2, C. Y. He2, X. Z. Cui2, and Y. Liu2

  • 1Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
  • 2China Institute of Atomic Energy, Beijing, 102413, People's Republic of China

  • *Electronic address: zhushj@mail.tsinghua.edu.cn

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Vol. 75, Iss. 3 — March 2007

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