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Extended collective bands in neutron-rich 109Ru

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【作者】 丁怀博； 朱胜江； J. H. Hamilton； A. V. Ramayya； J. K. Hwang； J. O. Rasmussen； C. T. Goodin； I. Y. Lee； 王建国； 车兴来； 顾龙；

【Author】 DING Huai-Bo1 ZHU Sheng-Jiang1,2;1) J. H. Hamilton2 A. V. Ramayya2 J. K. Hwang2 K. Li2 S. H. Liu2 Y. X. Luo2,3 J. O. Rasmussen3 C. T. Goodin2 I. Y. Lee3 WANG Jian-Guo1 CHE Xing-Lai1 GU Long1 1 (Department of Physics, Tsinghua University, Beijing 100084, China) 2 (Department of Physics, Vanderbilt University, Nashville, TN 37235, USA) 3 (Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA)

【机构】 Department of Physics, Tsinghua University； Department of Physics, Vanderbilt University； Lawrence Berkeley National Laboratory；

【摘要】 Levels in the neutron-rich 109Ru have been studied by observing the prompt γ-rays following the spontaneous fission fragments of 252Cf. The ground state band and the negative parity bands have been confirmed and extended. A positive parity band with the band head level at 332.5 keV is newly identified and suggested as a single-neutron excitation band built on the 7/2+[404] Nilsson orbital. Some structural characteristics of these bands are discussed.

【Abstract】 Levels in the neutron-rich 109Ru have been studied by observing the prompt γ-rays following the spontaneous fission fragments of 252Cf. The ground state band and the negative parity bands have been confirmed and extended. A positive parity band with the band head level at 332.5 keV is newly identified and suggested as a single-neutron excitation band built on the 7/2+[404] Nilsson orbital. Some structural characteristics of these bands are discussed.

【关键词】 collective levels； γ-transitions and level energies； neutron-rich nucleus； spontaneous fission；
【Key words】 collective levels； γ-transitions and level energies； neutron-rich nucleus； spontaneous fission；
【基金】 Supported by National Natural Science Foundation of China (10575057, 10775078);Major State Basic Research Development Program (2007CB815005);Doctoral Program Foundation of Institutions of Higher Education of China (20070003149);U. S. Department of Energy (DE-FG05-88ER40407, DE-AC03-76SF00098)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2009年S1期
  • 【分类号】O571.6
  • 【下载频次】20
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