In-beam γ-ray spectroscopy of U240 using the (O18,O16) reaction

作     者：T. Ishii S. Shigematsu M. Asai A. Makishima M. Matsuda J. Kaneko I. Hossain S. Ichikawa T. Kohno M. Ogawa 

作者机构：Department of Materials Science Japan Atomic Energy Research Institute Tokai Ibaraki 319-1195 Japan Department of Energy Sciences Tokyo Institute of Technology Yokohama 226-8502 Japan Advanced Science Research Center Japan Atomic Energy Research Institute Tokai Ibaraki 319-1195 Japan Department of Liberal Arts and Sciences National Defense Medical College Tokorozawa Saitama 359-8513 Japan Research Laboratory for Nuclear Reactors Tokyo Institute of Technology Meguro Tokyo 152-8550 Japan Department of Physics Seoul National University Seoul 151-747 Korea 

出 版 物：《Physical Review C》 (物理学评论C辑：核物理学)

年 卷 期：2005年第72卷第2期

页      面：021301(R)-021301(R)页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

主　　题：GROUND-STATE BAND EXCITED-STATES OCTUPOLE CORRELATIONS NUCLEI DEFORMATION ISOTOPES NO-254 

摘      要：In the two-neutron-transfer reaction of a 200-MeV O18 beam with a U238 target, deexcitation γ rays in a neutron-rich nucleus of U240 were measured. The γ rays in U240 were identified by taking coincidence with O16, using Si ΔE−E detectors. The kinetic energies of O16 particles allowed us to select the excitation energies of U240 below the neutron separation energy. The ground-state band and the Kπ=0− octupole band of U240 were established up to 12+ and 9−, respectively. The octupole-band head of U240 is about a hundred keV higher than those of U236,238, suggesting that a secondary maximum of octupole correlations exists at N=144−146 in U isotopes.