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《中国物理C》(英文)编辑部
2024年10月30日

Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

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Xu Shuwei1, Li Zhankul1, Xie Yuanxiang1, Pan Qiangyan1, Yu Yong1, J.Adam2, Wang Chunfang1, king Jianping1, Hu Qingyuan1, Li Shihong1, Chen Hongyan1, Zhang Tianmei1 and Jin Genming<sup. Six New Nuclides Near the Proton-drip Line in the Rare-earth Region[J]. Chinese Physics C, 1999, 23(6): 589-593.
Xu Shuwei1, Li Zhankul1, Xie Yuanxiang1, Pan Qiangyan1, Yu Yong1, J.Adam2, Wang Chunfang1, king Jianping1, Hu Qingyuan1, Li Shihong1, Chen Hongyan1, Zhang Tianmei1 and Jin Genming<sup. Six New Nuclides Near the Proton-drip Line in the Rare-earth Region[J]. Chinese Physics C, 1999, 23(6): 589-593. shu
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Received: 1999-03-12
Revised: 1900-01-01
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Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

    Corresponding author: Xu Shuwei1,
  • Institute of Modern Physics, The Chinese Academy of Science, Lanzhou 7300002 Flerov Laboratory of Nuclear Reactions, JINn Dubna, Russia

Abstract: Unknown isotopes 125Nd,128Pm,129Sm, 137Gd,139Dy and 139Tb were produced using enriched targets 92Mo,96Ru and 106Cd, respectively, bombarded by 36Ar ion beam with the energies of 165-180MeV from the SFC cyclotron of HIRFL. The six new nuclides were separated and identified by a He-jet combined with a fast-tape transport system as well as "p-γ" and "X-γ" coincidence measurements. Their half-lives were determined to be (0.60±0.15)s, (1.0±0.3)s, (0.55±0.10)s,(2.2±0.2)s, (0.6±0.2)s and (l.6±0.2)s, respectively. Energy spectra of β-delayed protons from 125Nd,128Pm,129Sm,137Gd and 139Dy decay were measured. Two γ-rays with the energies of 109.0 keV and 119.7 keV were assigned tO EC/β+ decay of 139Tb.

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