Revised spin-parity assignment and a new interpretation of the high-spin isomer in 151Er

T. Fukuchi, T. Hori, T. Masue, K. Tajiri, A. Sato, T. Furukawa, A. Odahara, T. Shimoda, Y. Wakabayashi, Y. Gono, T. Suzuki, M. Ukai, T. Wakui, A. Yamazaki, Y. Miyashita, N. Sato, M. Tateoka, M. Ohguma, T. Shinozuka, T. KoikeK. Shirotori, Y. Miura, S. Kinoshita, Y. Ma, Y. Y. Fu, H. Tamura

研究成果: Article査読

3 被引用数 (Scopus)

抄録

The high-spin isomer in 151Er ( E x = 10.3 MeV, T 1/2 = 420 ns) has been studied by the 116Sn ( 40Ar , 5n) 151Er reaction at 197MeV. From the γ coincidence relations, a new transition with an energy of 1514keV was found. This finding requires the revision of the spin-parity assignment from previous 67/2- to 61/2+ or 65/2- . The 61/2+ assignment is the one which was predicted by the deformed independent particle model as an isomer with a large oblate deformation (β = - 0.17of the [ν(f7/2h9/2 I 13/2) π(h411/2)] 61/2+ configuration. The isomerism may be attributed to the sudden shape change of the isomer from the nearly spherical shape of the lower-spin yrast states to the oblate shape.

本文言語English
ページ(範囲)49-51
ページ数3
ジャーナルEuropean Physical Journal A
39
1
DOI
出版ステータスPublished - 2009 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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