【作者】 崔兴柱； 竺礼华； 吴晓光； 李广生； 温书贤； 王治民； 贺创业； 张振龙； 孟锐； 马瑞刚； 骆鹏； 郑勇； 霍俊德； M.M．Ndontchueng；

【Author】 CUI Xing-zhu, ZHU Li-hua , WU Xiao-guang , LI Guang-sheng , WEN Shu-xian . WANG Zhi-min , HE Chuang-ye. ZHANG Zhcn-long, MENG Rui, MA Rui-gang, LUO Peng, ZHENG Yong, HUO Jun-de. M. M. Ndontchueng ( China Institute of Atomic Energy, Beijing 102413. China; Department of Physics . J ilin University, Changchun 130023. China; Institute oj Modern Physics, Chinese Academy of Science, Lanzhou 730000, China; Universite de Douala , Faculle de Sciences, B. P. 8580 Cameroun)

【机构】 中国原子能科学研究院； 中国科学院近代物理研究所； 吉林大学物理学院； Université de Douala Faculté de Sciences,B．P．8580 Cameroun；

【摘要】 用能量为80 MeV的19F束通过反应76Ge(19F,5n)如Nb布居了90Nb的高自旋态．通过在束γ测量分析90Nb退激γ射线的符合级联关系,发现了19条新的属于90Nb的γ跃迁,建立了90Nb的高自旋态能级纲图．通过经验壳模型计算指定了部分能级的组态,并结合实验DCO比值和与相邻 N=49核素的系统比较,确认了新能级的自旋和宇称．更多还原

【Abstract】 The high spin states of 90Nb have been populated via reaction 76Ge(19F, 5n)90Nb at beam energy of 80 MeV. The de-exciting γ-rays have been measured with in-beam γ-ray spectroscopy method. After γ-γ coincidence analysis, 19 new γ transitions were identified and assigned to 90Nb. The new level scheme of 90Nb was established. Based on the semi-empirical shell model calculations, the configurations of the levels have been suggested. In addition, the spins and parities of the new levels have been assigned according to the experimental DCO values and to the systematic comparison with the N = 49 neighboring nuclei.更多还原