摘要
High-spin states in 178'180Ir have been studied via the 152'154Sm(31P,5nγ)reactions through excitation functions,x-γandγ-γ-t coincidence measurements.A doubly decoupled band has been identified in each of the isotopes.The level spacings for such structures in odd-odd ^(178-186)Ir have been inspected and thus a regular level staggering as a function of the neutron number is revealed.This particular phenomenon may be associated with bandmixing at lower excitation energies.
作者
张玉虎
T.Hayakawa
M.Oshima
Y.Toh
J.Katakura
Y.Hatsukawa
M.Matsuda
N.Shinohara
T.Ishii
H.Kusakari
M.Sugawara
T.Komatsubara
ZHANG Yu-Hu;T.Hayakawa;M.Oshima;Y.Toh;J.Katakura;Y.Hatsukawa;M.Matsuda;N.Shinohara;T.Ishii;H.Kusakari;M.Sugawara;T.Komatsubara(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000;Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan;Chiba University,Inage-ku,Chiba 263-8512,Japan;Japan Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan;Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan)
基金
Supported by Japan STA(Science and Technology Agency)Scientist Exchange Program(Grant No.1998-21)
the National Natrural Science Foundation of China under Grant No.19605008.
