EPJ

2023 Impact factor 2.6
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 7, 11-14

Short note

Observation of intermediate bands feeding the positive-parity yrast band in 155Gd

J.Y. Huh1 - C.S. Lee1 - Y.K. Kwon1 - J.Y. Kim1 - Y. Gono2 - T. Morikawa2 - H. Watanabe2 - M. Shibata2 - S. Motomura2 - T. Tsutsumi2 - T. Fukuchi2 - T. Kishida3 - E. Ideguchi3 - X.H. Zhou3 - A. Odahara4 - S. Kubono5 - J.H. Ha6 - M.K. Cheoun6 - C. Lee6 - J.C. Kim6 - C.-B. Moon7 - S.J. Chae7 - Y.K. Kim8 - J.S. Chai9

1 Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea
2 Department of Physics, Kyushu University, Fukuoka 812-81, Japan
3 RIKEN, Wako, Saitama 351-01, Japan
4 Nishi-nippon Institute of Technology, Fukuoka 800-03, Japan
5 Center for Nuclear Study, University of Tokyo, 3-2-1 Midoicho, Tanashi, Tokyo 188, Japan
6 Department of Physics, Seoul National University, Seoul 151-742, Republic of Korea
7 Department of Physics, Hoseo University, Chung-Nam 337-795, Republic of Korea
8 Korea Atomic Energy Research Institute, Taejon 305-600, Republic of Korea
9 Korea Cancer Center Hospital, Seoul 139-240, Republic of Korea

Received: 2 November 1999 Communicated by B. Herskind

Abstract
High-spin states of 155Gd were populated by using the 154Sm($\alpha$,3n$\gamma$)155Gd reaction at $E_{\alpha}$ = 33 MeV. $\gamma-\gamma$ coincidence, $E_{\gamma}$ singles, excitation function, and the DCO ratios were measured. we have identified three intermediate bands with $\Delta I = 2$ feeding the positive yrast band. The bands are interpreted as such candidate bands that are mixed with the negative-parity ground state band. This observation can provide a plausible explanation for unusually large population of the positive-parity yrast band observed in a recent Coulomb excitation.

PACS
23.20.Lv Gamma transitions and level energies - 27.70.+q $150 \leq A \leq 189$

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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