Investigation into behavior of weakly-bound proton via B(GT) measurement for the {beta} decay of {sup 24}Si

Journal Article · Wed Aug 26 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3232163· OSTI ID:21322885

Ichikawa, Y ^[1]; Onishi, T K; Suzuki, D; Iwasaki, H; Nakao, T; Suzuki, H; Suzuki, M K ^[1]; Banerjee, V; Chakrabarti, A ^[2]; Kubo, T; Aoi, N; Fukuda, N; Motobayashi, T; Yamada, K N; Sakurai, H ^[3]; Brown, B A ^[4]; Kubono, S; Yamaguchi, H ^[5]; Nakabayashi, T; Nakamura, T ^[6]

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1. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)
2. Variable Energy Cyclotron Centre, 1/AF, Bidhan, Nagar, Kolkata-700 064 (India)
3. RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
4. Department of Physics and Astronomy, and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
5. Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)
6. Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551 (Japan)

The {beta}-decay spectroscopy on {sup 24}Si was carried out in order to investigate the behavior of a weakly-bound s-wave proton. We observed two {beta} transitions to low-lying bound states in {sup 24}Al for the first time. The Gamow-Teller transition strengths B(GT) to the 1{sub 1}{sup +} and 1{sub 2}{sup +} states were deduced to be 0.13(2) and 0.14(1), which were smaller than that of mirror nucleus {sup 24}Ne by 22% and 10%, respectively. These mirror asymmetries of B(GT) indicate the configuration change in the wave function. By comparing with theoretical shell-model calculations, it is implied that the configuration change is attributed to the lowering of the 1s{sub 1/2} orbital.

• OSTI ID: 21322885
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1165; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 24
ASYMMETRY
BETA DECAY
BOUND STATE
GAMOW-TELLER RULES
MIRROR NUCLEI
NEON 24
NUCLEAR STRUCTURE
PROTONS
S WAVES
SHELL MODELS
SILICON 24
STRENGTH FUNCTIONS
WAVE FUNCTIONS