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Joakim

Joakim Cederkäll

Professor

Joakim

Asymmetry in the super-allowed β-transitions of the A=9 isobars

Author

  • M. J G Borge
  • Y. Prezado
  • U. C. Bergmann
  • R. Boutami
  • J. Cederkäll
  • C. Aa Diget
  • L. M. Fraile
  • H. O U Fynbo
  • Y. Jading
  • H. Jeppesen
  • B. Jonson
  • I. Martel
  • M. Meister
  • T. Nilsson
  • G. Nyman
  • K. Riisager
  • H. Simon
  • O. Tengblad
  • L. Weissman
  • F. Wenander
  • K. Wilhelmsen

Summary, in English

We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in 9Be (11.8 MeV) arid 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.

Publishing year

2004-06-28

Language

English

Pages

206-210

Publication/Series

Nuclear Physics A

Volume

738

Issue

1-4 SUPPL.

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0375-9474