The European Physical Journal A

, 42:375

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. Yamada
  • H. Yamaguchi
  • H. Sakurai
Regular Article - Experimental Physics

Abstract

\( \beta\) -decay spectroscopy on a Tz = - 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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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Y. Ichikawa
    • 1
  • T. Kubo
    • 2
  • N. Aoi
    • 2
  • V. Banerjee
    • 3
  • A. Chakrabarti
    • 3
  • N. Fukuda
    • 2
  • H. Iwasaki
    • 1
  • S. Kubono
    • 4
  • T. Motobayashi
    • 2
  • T. Nakabayashi
    • 5
  • T. Nakamura
    • 5
  • T. Nakao
    • 1
  • T. Okumura
    • 5
  • H. J. Ong
    • 1
  • T. K. Onishi
    • 1
  • D. Suzuki
    • 1
  • H. Suzuki
    • 1
  • M. K. Suzuki
    • 1
  • T. Teranishi
    • 6
  • K. N. Yamada
    • 2
  • H. Yamaguchi
    • 4
  • H. Sakurai
    • 2
  1. 1.Department of PhysicsUniversity of TokyoTokyoJapan
  2. 2.RIKEN Nishina CenterRIKENSaitamaJapan
  3. 3.Variable Energy Cyclotron CentreKolkataIndia
  4. 4.Center for Nuclear StudyUniversity of TokyoTokyoJapan
  5. 5.Department of PhysicsTokyo Institute of TechnologyTokyoJapan
  6. 6.Department of PhysicsKyushu UniversityFukuokaJapan

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