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New β-delayed proton precursor 149Yb near the proton drip line

  • S.-W. Xu
  • Z.-K. Li
  • Y.-X. Xie
  • X.-D. Wang
  • B. Guo
  • C.-G. Leng
  • Y. Yu
Short Note

Abstract.

The β-delayed proton precursor 149Yb was synthesized in the reaction 112Sn(40Ca, 3n) and identified by using a proton-gamma coincidence measurements in combination with a helium-jet fast tape transport system. Its β-delayed proton spectrum was observed. The half-life of 149Yb was determined to be 0.7±0.2 s. The 253, 101, and 365 keV γ transitions in 147Dy, following β-delayed proton emission of 148Ho decay, were reported for the first time.

PACS. 23.40.-s Beta decay; double beta decay; electron and muon capture – 21.10.Tg Lifetimes – 27.60.+j 90 ?A? 149 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2001

Authors and Affiliations

  • S.-W. Xu
    • 1
  • Z.-K. Li
    • 1
  • Y.-X. Xie
    • 1
  • X.-D. Wang
    • 1
  • B. Guo
    • 1
  • C.-G. Leng
    • 1
  • Y. Yu
    • 1
  1. 1.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, PRCCN

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