On the decrease in charge radii of multi-quasi particle isomers期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	M.L. Bissell,K.T. Flanagan,M.D. Gardner,M. Avgoulea,J. Billowes,P. Campbell,B. Cheal,T. Eronen,D.H. Forest,J. Huikari,A. Jokinen,I.D. Moore,A. Nieminen,H. Penttilä ,S. Rinta-Antila,B. Tordoff,G. Tungate,J. Ä ystö

Affiliation:	1. School of Physics and Astronomy, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;2. Schuster Laboratory, The University of Manchester, Manchester M13 9PL, UK;3. Department of Physics, University of Jyväskylä, PB 35 (YFL) FIN-40351 Jyväskylä, Finland

Abstract:	We report changes in mean-square charge radii, δ〈r²〉 $δ 〈 r^{2} 〉$ , magnetic moments and quadrupole moments for three multi-quasi particle isomers; ^97m2Y, ^176mYb and ^178m1Hf. All the isomers are observed to display a decrease in 〈r²〉 $〈 r^{2} 〉$ compared to the lower-lying nuclear state on which the isomer is built. The decreases in 〈r²〉 $〈 r^{2} 〉$ 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.

Keywords:	21.10.Ft 21.10.Ky 42.62.Fi
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