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

Borge, M. J G; Prezado, Y.; Bergmann, U. C.; Boutami, R.; Cederkäll, J. LU ; Diget, C. Aa; Fraile, L. M.; Fynbo, H. O U; Jading, Y. and Jeppesen, H., et al. (2004) In Nuclear Physics A 738(1-4 SUPPL.). p.206-210
Abstract

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.

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publishing date
type
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publication status
published
subject
in
Nuclear Physics A
volume
738
issue
1-4 SUPPL.
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:4444302903
ISSN
0375-9474
DOI
10.1016/j.nuclphysa.2004.04.074
language
English
LU publication?
no
id
bb234114-ce89-4fb1-8ff4-801a6b1a60ae
date added to LUP
2016-12-20 14:15:22
date last changed
2017-07-20 07:01:21
@article{bb234114-ce89-4fb1-8ff4-801a6b1a60ae,
  abstract     = {<p>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 <sup>9</sup>Be (11.8 MeV) arid <sup>9</sup>B (12.2 MeV) fed in the β-decay of <sup>9</sup>Li and <sup>9</sup>C 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.</p>},
  author       = {Borge, M. J G and Prezado, Y. and Bergmann, U. C. and Boutami, R. and Cederkäll, J. and Diget, C. Aa and Fraile, L. M. and Fynbo, H. O U and Jading, Y. and Jeppesen, H. and Jonson, B. and Martel, I. and Meister, M. and Nilsson, T. and Nyman, G. and Riisager, K. and Simon, H. and Tengblad, O. and Weissman, L. and Wenander, F. and Wilhelmsen, K.},
  issn         = {0375-9474},
  language     = {eng},
  month        = {06},
  number       = {1-4 SUPPL.},
  pages        = {206--210},
  publisher    = {Elsevier},
  series       = {Nuclear Physics A},
  title        = {Asymmetry in the super-allowed β-transitions of the A=9 isobars},
  url          = {http://dx.doi.org/10.1016/j.nuclphysa.2004.04.074},
  volume       = {738},
  year         = {2004},
}