Abstract
\( \beta\) -decay spectroscopy on a T z = - 2 proton-rich nucleus 24Si was performed. The decay scheme of 24Si was reconstructed by the \( \beta\) -delayed \( \gamma\) -ray and proton measurements. Two \( \beta\) 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 .
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References
J. Äystö et al., Phys. Lett. B 82, 43 (1979).
V. Banerjee et al., Phys. Rev. C 63, 024307 (2001).
S. Czajkowski et al., Nucl. Phys. A 628, 537 (1998).
T. Kubo et al., Nucl. Instrum. Methods B 70, 309 (1992).
R.G. Sextro et al., Phys. Rev. C 8, 258 (1973).
J.C. Hardy et al., Phys. Rev. Lett. 91, 082501 (2003).
V.E. Iacob et al., Phys. Rev. C 74, 015501 (2006).
J. Honkanen et al., Phys. Scr. 19, 239 (1979).
G.C. Kiang et al., Nucl. Phys. A 499, 339 (1989).
S. Kubono et al., Nucl. Phys. A 588, 521 (1995).
R.A. Gough et al., Phys. Rev. Lett. 28, 510 (1972).
K. Peräjärvi et al., Phys. Lett. B 492, 1 (2000).
R.E. McDonald et al., Phys. Rev. 181, 1631 (1969).
G. Audi et al., Nucl. Phys. A 729, 337 (2003).
R.G. Thomas, Phys. Rev. 88, 1109 (1952).
J.B. Ehrman, Phys. Rev. 81, 412 (1951).
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Ichikawa, Y., Kubo, T., Aoi, N. et al. Beta-decay study of Tz = - 2 proton-rich nucleus 24Si. Eur. Phys. J. A 42, 375–378 (2009). https://doi.org/10.1140/epja/i2008-10761-8
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DOI: https://doi.org/10.1140/epja/i2008-10761-8