Open AccessOn the mechanism of signature inversion in the yrast band of 84Rb
Author(s) -
Shen Shui-Fa,
Shi Shuang-Hui,
Gu JiaHui,
Jingyi Liu,
Shen WenQing
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.48
Subject(s) - yrast , spins , physics , quadrupole , parity (physics) , oblate spheroid , angular momentum , nucleus , atomic physics , signature (topology) , condensed matter physics , quantum mechanics , geometry , excited state , mathematics , microbiology and biotechnology , biology
The angular momentum projected shell model(PSM) is applied to the nucleus 84Rb. The results of theoretical calculations about the positiveparity yrast band with configuration πg9/2νg9/2 and the negativeparity yrast band with configuration π(p3/2,f5/2)νg9/2 are comparedwith experimental data;especially,the mechanism of signature inversion in the positiveparity yrast band is discussed.The interpretation within the PSM shows that this signature pattern is a signal of a substantial quadrupole shape change with increasing spin,where the nucleus evolves from a prolate shape at low spins through a triaxial shape to an oblate shape at high spins.In addition,the nuclear shape for these two bands are also specified.