Hyperfine Interactions

, Volume 84, Issue 1, pp 491–498 | Cite as

Secondary reaction of Ps in the positron spur

  • T. Hirade
  • O. E. Mogensen


Recently, high-quality positron annihilation lifetime measurements showed that four components of lifetime spectra for many liquids could be resolved. The well-known three components (para-Ps (positronium), free positron, and ortho-Ps) and a short-lived ortho-Ps component were obtained in many liquids. This short-lived ortho-Ps is probably caused by secondary reactions of ortho-Ps and other reactants, such as a positive ion, in the positron spur. We report the first results of measurements of the yield of this short-lived ortho-Ps component in the system of hexane and the electron scavengers CCl4, CS2, C6F6, and SF6.


Thin Film Hexane CCl4 Secondary Reaction Positron Annihilation 
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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • T. Hirade
    • 1
  • O. E. Mogensen
    • 1
  1. 1.Chemistry DepartmentJapan Atomic Energy Research InstituteIbaraki-kenJapan

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