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The N = Z nucleus 76 Sr: Gamow-Teller strength and nuclear deformation

  • Ph DessagneEmail author
  • M. J. G. Borge
  • J. Giovinazzo
  • A. Huck
  • A. Jokinen
  • A. Knipper
  • C. Longour
  • G. Marguier
  • M. Ramdhane
  • V. Rauch
  • O. Tengblad
  • G. Walter
  • Ch. Miehé
  • the ISOLDE Collaboration
Article

Abstract.

Challenged by recent theoretical work, a study of the \(\beta^ + \)-EC decay of the N = Z even-even nucleus 76 Sr has been undertaken in order to assign the parent ground-state deformation. In this study 13 levels with \(J^{\pi} = 1^{ + }\) have been located in 76 Rb. The beta-delayed proton emission has been observed for the first time in an N = Z even-even nucleus. The \(\beta\)p branching ratio has been determined to be \((3.4 \pm 0.8)\cdot 10^{-5}\). The 76 Sr half-life has been remeasured and a more precise value of \(7.89 \pm 0.07\) s has been obtained. On the basis of the comparison of measured Gamow-Teller strength with calculated strength distributions for both oblate and prolate deformation, it is concluded that the 76 Sr has strong prolate deformation in the ground state.

Keywords

Theoretical Work Prolate Strength Distribution Proton Emission Nuclear Deformation 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • Ph Dessagne
    • 1
    Email author
  • M. J. G. Borge
    • 2
  • J. Giovinazzo
    • 1
  • A. Huck
    • 1
  • A. Jokinen
    • 3
  • A. Knipper
    • 1
  • C. Longour
    • 1
  • G. Marguier
    • 4
  • M. Ramdhane
    • 3
  • V. Rauch
    • 1
  • O. Tengblad
    • 2
    • 3
  • G. Walter
    • 1
  • Ch. Miehé
    • 1
  • the ISOLDE Collaboration
  1. 1.Institut de Recherches SubatomiquesUMR 7500 CNRS-IN2P3 et Université Louis PasteurStrasbourg Cedex 2,France
  2. 2.Instituto de Estructura de la Materia,CSICMadrid,Spain
  3. 3.Division EP, CERN,ISOLDEGenevaSwitzerland
  4. 4.Institut de Physique Nucléaire,Université Claude Bernard-Lyon IVilleurbanne CedexFrance

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