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.
KeywordsThin Film Hexane CCl4 Secondary Reaction Positron Annihilation
Unable to display preview. Download preview PDF.
- O.E. Mogensen and F.M. Jacobsen, Chem. Phys. 73(1982)223.Google Scholar
- 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
- G. Consalati, D. Gerola and F. Quasso, I Phys. Condens. Matter 3(1991)7739.Google Scholar
- O.E. Mogensen, J. Chem. Phys. 60(1974)998.Google Scholar
- T. Hirade and O.E. Mogensen, Chem. Phys. 170(1993)249.Google Scholar
- P. Kirkegaard, M. Eldrup, O.E. Mogensen and N.J. Pedersen, Comp. Phys. Comm. 23(1981)307.Google Scholar
- P. Kirkegaard, N.J. Pedersen and M. Eldrup, PATFIT-88, Risø-M-2740 (1989).Google Scholar
- P. Jansen and O.E. Mogensen, Chem. Phys. 25(1977)75.Google Scholar