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Gamma Decay of the Lowly Excited States of 229AC |
YUAN Shuang-gui;YANG Wei-fan;SHEN Shui-fa;FANG Ke-ming;MOU Wan-tong;ZHANG Xue-qian;LI Zong-wei |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 |
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Cite this article: |
YUAN Shuang-gui, YANG Wei-fan, SHEN Shui-fa et al 1997 Chin. Phys. Lett. 14 263-265 |
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Abstract By bombarding the natural thorium targets with 14 MeVneutrons, 229Ra was produced through the reaction 232Th(n,α) 229Ra. The radium activities were separated from the irradiated targets by coprecipitation with BaC12. A total of 18 weak γ rays with energies of 14.5, 15.6, 18.8, 21.8, 22.5, 44.0, 47.5, 55.0, 63.0, 69.6, 93.6, 94.1, 98.5, 102.2, 104.5, 106.1, 161.1, and 171.5keV, which could be assigned to the decay of 229Ra, has been observed in the isolated radium fractions employing high-resolution HPGe detectors and γ (x)- γ coincidence methods. A decay scheme of 229Ra based on these observations has been proposed.
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Keywords:
23.40.-s
27.90.+b
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Published: 01 April 1997
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PACS: |
23.40.-s
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(β-decay;double β-decay; electron and muon capture)
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27.90.+b
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(A ≥ 220)
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