On the decrease in charge radii of multi-quasi particle isomers

Mark Bissell, Matthew Gardner, Bradley Cheal, David Forest, Garry Tungate

Research output: Contribution to journalArticle

25 Citations (Scopus)


We report changes in mean-square charge radii, delta(r(2)), magnetic moments and quadrupole moments for three multi-quasi particle isomers; (97m2)y, Yb-176m and Hf-178m1. All the isomers are observed to display a decrease in (r(2)) compared to the lower-lying nuclear state on which the isomer is built. The decreases in (r(2)) occur despite the isomers showing increases in quadrupole moment. Possible mechanisms for the effect, which is now seen for six multi-quasi particle isomers, are discussed. (c) 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)330-334
Number of pages5
JournalPhysics Letters B
Issue number4
Publication statusPublished - 15 Feb 2007


  • nuclear moments
  • isomer shifts
  • nuclear charge radius


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