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Observation of intermediate bands feeding the positive-parity yrast band in 155Gd |
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| Authors: | JY Huh CS Lee YK Kwon JY Kim Y Gono T Morikawa H Watanabe M Shibata S Motomura T Tsutsumi T Fukuchi T Kishida E Ideguchi XH Zhou A Odahara S Kubono JH Ha MK Cheoun C Lee JC Kim C-B Moon SJ Chae YK Kim JS Chai |
| Institution: | (1) Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea, KR;(2) Department of Physics, Kyushu University, Fukuoka 812-81, Japan, JP;(3) RIKEN, Wako, Saitama 351-01, Japan, JP;(4) Nishi-nippon Institute of Technology, Fukuoka 800-03, Japan, JP;(5) Center for Nuclear Study, University of Tokyo, 3-2-1 Midoicho, Tanashi, Tokyo 188, Japan, JP;(6) Department of Physics, Seoul National University, Seoul 151-742, Republic of Korea, KR;(7) Department of Physics, Hoseo University, Chung-Nam 337-795, Republic of Korea, KR;(8) Korea Atomic Energy Research Institute, Taejon 305-600, Republic of Korea, KR;(9) Korea Cancer Center Hospital, Seoul 139-240, Republic of Korea, KR |
| Abstract: | High-spin states of 155Gd were populated by using the 154Sm(α,3nγ)155Gd reaction at E α= 33 MeV. γ-γ coincidence, E γ singles, excitation function, and the DCO ratios were measured. we have identified three intermediate bands with ΔI= 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. Received: 2 November 1999 |
| Keywords: | PACS: 23 20 Lv Gamma transitions and level energies – 27 70 +q 150 ≤ A ≤ 189 |
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