Document Detail


Elucidation of the anomalous a=9 isospin quartet behavior.
MedLine Citation:
PMID:  23003246     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Recent high-precision mass measurements of ^{9}Li and ^{9}Be, performed with the TITAN Penning trap at the TRIUMF ISAC facility, are analyzed in light of state-of-the-art shell model calculations. We find an explanation for the anomalous isobaric mass multiplet equation behavior for the two A=9 quartets. The presence of a cubic d=6.3(17)  keV term for the J^{π}=3/2^{-} quartet and the vanishing cubic term for the excited J^{π}=1/2^{-} multiplet depend upon the presence of a nearby T=1/2 state in ^{9}B and ^{9}Be that induces isospin mixing. This is contrary to previous hypotheses involving purely Coulomb and charge-dependent effects. T=1/2 states have been observed near the calculated energy, above the T=3/2 state. However, an experimental confirmation of their J^{π} is needed.
Authors:
M Brodeur; T Brunner; S Ettenauer; A Lapierre; R Ringle; B A Brown; D Lunney; J Dilling
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Publication Detail:
Type:  Journal Article     Date:  2012-05-23
Journal Detail:
Title:  Physical review letters     Volume:  108     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  212501     Citation Subset:  IM    
Affiliation:
TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
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