Doubly Decoupled Structure in Odd-Odd ^(178-186)Ir Nuclei

查看全文 作　　者：[1]张玉虎;[2]T.Hayakawa;[2]M.Oshima;[2]Y.Toh;[2]J.Katakura;[2]Y.Hatsukawa;[2]M.Matsuda;[2]N.Shinohara;[2]T.Ishii;[3]H.Kusakari;[4]M.Sugawara;[5]T.Komatsubara 机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000;[2]Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan;[3]Chiba University,Inage-ku,Chiba 263-8512,Japan;[4]Japan Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan;[5]Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan 出　　处：《Chinese Physics Letters》索引2001年第18卷第1期,共3页 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. 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. 关 键 词：EXCITATION COINCIDENCE