Numéro
J. Phys. IV France
Volume 03, Numéro C4, Septembre 1993
4th International Workshop on Positron and Positronium Chemistry
Page(s) C4-127 - C4-130
DOI http://dx.doi.org/10.1051/jp4:1993415
4th International Workshop on Positron and Positronium Chemistry

J. Phys. IV France 03 (1993) C4-127-C4-130

DOI: 10.1051/jp4:1993415

Effects of scavengers on short-lived ortho-Ps

T. HIRADE and O.E. MOGENSEN

Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki, 319-11, Japan


Abstract
Positron lifetime spectra are usually analyzed with three exponentially decaying components, para-Ps (positronium), free positron and ortho-Ps. However, a fourth component was obtained in many liquids. We reported the first results of the inhibition of the fourth component by CCl4 in hexane and proposed a model. We show that the effects of several electron and positive ion (hole) scavengers, such as CS2, C6F6, SF6 and pyridine on the fourth component are successfully explained with this model.



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