High-Spin States and Negative Parity Levels in Neutron-Rich 116,118,120Cd Nuclei

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XIAO Shu-Dong, ZHU Sheng-Jiang, YANG Li-Ming, ZHANG Zheng, JIANG Zhuo, CHE Xing-Lai and U Yong-Nan. High-Spin States and Negative Parity Levels in Neutron-Rich 116,118,120Cd Nuclei[J]. Chinese Physics C, 2004, 28(1): 37-41.
XIAO Shu-Dong, ZHU Sheng-Jiang, YANG Li-Ming, ZHANG Zheng, JIANG Zhuo, CHE Xing-Lai and U Yong-Nan. High-Spin States and Negative Parity Levels in Neutron-Rich 116,118,120Cd Nuclei[J]. Chinese Physics C, 2004, 28(1): 37-41. shu
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Received: 2003-05-16
Revised: 1900-01-01
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High-Spin States and Negative Parity Levels in Neutron-Rich 116,118,120Cd Nuclei

    Corresponding author: ZHU Sheng-Jiang,
  • Department of Physics,Tsinghua University,Beijing 100084,China2 Department of Physics,Vanderbilt University,Nashville,TN 37235,USA3 Lawrence Berkeley National Laboratory,Berkeley,CA 94720,USA4 Department of Physics,Mississippi State University,MS 39762,USA

Abstract: High spin states in neutron-rich 116,118,120Cd nuclei have been investigated by observing high-fold prompt γ-ray coincidence events from the spontaneous fission of 252Cf with the Gammasphere detector array. The yrast bands have been extended with spin up to 18h in118Cd and 16h in 116,120Cd respectively. The band structures are calculated using the cranked shell model and possible origination for the backbends in the yrast bands is discussed. Proposed 5 and 7 levels are observed in each of these cadmium isotopes, and possible explanation for the negative states is discussed based on systematic comparison. A quasi-rotational band based on 7 level in 118Cd has been established.

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