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Signature inversion in the yrare band of 119Xe

  • C.-B. Moon
  • T. Komatsubara
  • Y. Sasaki
  • T. Jumatsu
  • K. Yamada
  • K. Satou
  • K. Furuno
Short Note

Abstract:

Excited states of the 119Xe nucleus have been studied by using in-beam γ-ray spectroscopy with the 107Ag ( 16O, p3n) 119Xe fusion-evaporation reaction at a beam energy of 85 MeV. The level scheme of 119Xe has been derived from γ-γ coincidence and γ-γ angular correlation analyses. We have, for the first time, established the second negative-parity favored and unfavored states built on the 11/2- state, namely the yrare rotational bands in 119Xe. In contrast to the behavior of the yrast bands where the favored states are lying lower in energy, the yrare favored states were observed to lie above the unfavored band. Such a signature inversion in 119Xe is changed to be normal at I = 12?.

PACS. 21.10.Re Collective levels – 23.20.Lv Gamma transitions and level energies – 27.60.+j 90 ?A? 149 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • C.-B. Moon
    • 1
  • T. Komatsubara
    • 2
  • Y. Sasaki
    • 2
  • T. Jumatsu
    • 2
  • K. Yamada
    • 2
  • K. Satou
    • 2
  • K. Furuno
    • 2
  1. 1.Department of Physics, Hoseo University, Chung-Nam 336-795, KoreaKR
  2. 2.Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-8577, JapanJP

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