New multi-phonon gamma vibrational bands in A～110 neutron-rich nuclei

作     者：HAMILTON J H RAMAYYA A V RASMUSSEN J O HWANG J K YEOH E Y 

作者机构：Department of Physics Vanderbilt University Nashville TN 37235 USA Lawrence Berkeley National Laboratory Berkeley CA 94720 USA Department of Physics Tsinghua University Beijing 100084 China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2011年第54卷第S1期

页      面：44-48页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：supported by the Major State Basic Research Development Program (Grant No. 2007CB815005) the National Natural Science Foundation of China (Grant No. 10775078) supported by U. S. Department of Energy (Grant Nos. DE-FG05-88ER40407 and DEAC03-76SF00098) 

主　　题：high spin states neutron-rich nucleus γ-vibrational bands 

摘      要：The high spin states of neutron-rich 103Nb, 107Tc and 109Tc nuclei in A^110 region have been investigated by measuring prompt γ-γ-γ coincident measurements populated with the spontaneous fission of 252Cf with the Gammasphere detector array. In 103Nb, one-phonon K = 9/2 and two-phonon K = 13/2 γ-vibrational bands have been identified. In 107Tc and 109Tc, one-phonon K = 11/2 and two-phonon K = 15/2 γ-vibrational bands, in which the zero-phonon bands are based on K=7/2 excited states, have also been identified. The two-phonon bands are first observed in odd-Z nuclei. The characteristics for these band structures have been discussed.