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作 者:丁怀博 朱胜江 J.H.Hamilton A.V.Ramayya J.K.Hwang Y.X.Luo J.0.Rasmussen I.Y.Lee 车兴来 王建国 徐强
机构地区:[1]Department of Physics, Tsinghua University, Beijing 100084 [2]Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 USA [3]Lawrence Berkeley National Laboratory, Berkeley, California 94720 USA
出 处:《Chinese Physics Letters》2007年第6期1517-1520,共4页中国物理快报(英文版)
基 金:Supported by the National Natural Science Foundation of China under Grant No 10575057, 10375032, the Special Program of Higher Education Science Foundation under Grant No 200003090. the U. S. Department of Energy under Grant and Contract No DE-FG05-88ER40407 and DE-AC03-76SF00098.
摘 要:High spin states in the neutron-rich ^108Mo nucleus are studied by measuring prompt γ-rays following the spontaneous fission of 252Cf with a Gammasphere detector array. The ground-state band is confirmed, and the one-phonon γ-vibrational band is updated with spin up to 12h. A new collective band with the band head level at 1422.4keV is suggested as a two-phonon γ-vibrational band. Another new band is proposed as a two-quasi- proton excitation band. Systematic characteristics of the collective bands are discussed.High spin states in the neutron-rich ^108Mo nucleus are studied by measuring prompt γ-rays following the spontaneous fission of 252Cf with a Gammasphere detector array. The ground-state band is confirmed, and the one-phonon γ-vibrational band is updated with spin up to 12h. A new collective band with the band head level at 1422.4keV is suggested as a two-phonon γ-vibrational band. Another new band is proposed as a two-quasi- proton excitation band. Systematic characteristics of the collective bands are discussed.
分 类 号:O57[理学—粒子物理与原子核物理]
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