Level Scheme of High-Spin States in 145Tb

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ZHENG Yong, ZHOU Xiao-Hong, ZHANG Yu-Hu, LIU Zhong, PAN Qiang-Yan, GAN Zai-Guo, Level Scheme of High-Spin States in 145Tb[J]. Chinese Physics C, 2002, 26(4): 359-363.
ZHENG Yong, ZHOU Xiao-Hong, ZHANG Yu-Hu, LIU Zhong, PAN Qiang-Yan, GAN Zai-Guo, Level Scheme of High-Spin States in 145Tb[J]. Chinese Physics C, 2002, 26(4): 359-363. shu
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Received: 2001-06-27
Revised: 1900-01-01
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Level Scheme of High-Spin States in 145Tb

  • Institue of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195,Japan3 Chiba University, Inage-ku, Chiba 263-8512, Japan4 Chiba Institute of Technology, Narashino, Chiba 275-0023,Japan

Abstract: High-spin states of 143Tb have been studied via the 118Sn(32S,1p4n)145Tb reaction by means of in-beam γ-ray spectroscopy. Measurements of γ-ray excitation functions and γ-γ-t coincidences were performed with 12 BGO(AC)HPGe detectors. A level scheme for 145Tb including 41 γ-rays which come from the deexcitations of the 24 levels, has been established for the first time based on an analysis of the γ-ray excitation functions, γ-γ coincidence relationships, intensity balances and cross-over transitions. The spins for most of the levels in the scheme are assigned according to the results of the measured γ-ray anisotropies. Considering the structure similarity between 143Eu and 145Tb, the low-lying levels in 145Tb are interpreted by coupling a h9/2 proton to the excited states in 144Gd core.

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