Advertisement

Hyperfine Interactions

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

Secondary reaction of Ps in the positron spur

  • T. Hirade
  • O. E. Mogensen
Article

Abstract

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.

Keywords

Thin Film Hexane CCl4 Secondary Reaction Positron Annihilation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    O.E. Mogensen and F.M. Jacobsen, Chem. Phys. 73(1982)223.Google Scholar
  2. [2]
    F.M. Jaconsen, O.E. Mogensen and N.J. Pedersen, in:Positron Annihilation, Proc. 9th Conf. of Positron Annihilation, Gent, Belgium, 1988, eds. L. Dorikens-Vanpraet, M. Dorikens and D. Segers (World Scientific, Singapore).Google Scholar
  3. [3]
    G. Consalati, D. Gerola and F. Quasso, I Phys. Condens. Matter 3(1991)7739.Google Scholar
  4. [4]
    O.E. Mogensen, J. Chem. Phys. 60(1974)998.Google Scholar
  5. [5]
    T. Hirade and O.E. Mogensen, Chem. Phys. 170(1993)249.Google Scholar
  6. [6]
    P. Kirkegaard, M. Eldrup, O.E. Mogensen and N.J. Pedersen, Comp. Phys. Comm. 23(1981)307.Google Scholar
  7. [7]
    P. Kirkegaard, N.J. Pedersen and M. Eldrup, PATFIT-88, Risø-M-2740 (1989).Google Scholar
  8. [8]
    P. Jansen and O.E. Mogensen, Chem. Phys. 25(1977)75.Google Scholar

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

Personalised recommendations