Beta-decay study of Tz = - 2 proton-rich nucleus 24Si

Y. Ichikawa, T. Kubo, N. Aoi, V. Banerjee, A. Chakrabarti, N. Fukuda, H. Iwasaki, S. Kubono, T. Motobayashi, T. Nakabayashi, T. Nakamura, T. Nakao, T. Okumura, H. J. Ong, T. K. Onishi, D. Suzuki, H. Suzuki, M. K. Suzuki, T. Teranishi, K. N. YamadaH. Yamaguchi, H. Sakurai

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β-decay spectroscopy on a Tz = - 2 proton-rich nucleus 24Si was performed. The decay scheme of 24Si was reconstructed by the β-delayed γ-ray and proton measurements. Two β branches to the bound 11+ and 12+ states in 24Al were observed for the first time. The observation of the allowed transition firmly established the spin-parity assignment for the 12+ states. The branching ratios to the 11+ and 12+ states were determined to be 31(4)% and 23.9(15)%, respectively. The branching ratios to three unbound states in 24Al including a new level at 6.735MeV were also determined for the first time. The level structure of 24Al was compared with its mirror nucleus 24Na. The Thomas-Ehrman shift on the 12+ state indicates s-wave dominance in the state as well as a characteristic behavior of the weakly bound s-wave proton in 24Al.

Original languageEnglish
Article number375
Pages (from-to)375-378
Number of pages4
JournalEuropean Physical Journal A
Issue number3
Publication statusPublished - Dec 2009

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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