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Observation of β-delayed two-proton emission in the decay of 22Si

  • [设施]:兰州重离子研究装置
  • [期刊/会议名称]:Physics Letters B
  • [摘要]:The decay of the lightest nucleus with Tz=−3, 22Si, was studied by a silicon array. A charged-particle group at 5600 (70)keV in the decay-energy spectrum was identified experimentally as β-delayed two-proton emission from the isobaric analog state (IAS) of 22Al. Experimental results of the IAS fed by a superallowed Fermi transition were compared with our large-scale shell-model calculations. The ground-state mass of 22Si was obtained indirectly in the experiment for the first time. Two-proton separation energy for 22Si is deduced to be −108(125)keV, which indicates that it is a very marginal candidate for two-proton ground-state emission.
  • [发表日期]:2017
  • [第一作者]:X.X.Xu
  • [第一作者单位]:中国原子能科学研究院
  • [通讯作者]:林承键
  • [通讯作者单位]:中国原子能科学研究院
  • [论文类型]:期刊
  • [期刊分类]:SCI1区
  • [学科分类]:物理
  • [影响因子]:5.646
  • [关键词]:
  • [卷号]:
  • [期号]:766
  • [起止页码]:312-316
  • [简介]: