Positrons in doped pyrene

Literature Information

Publication Date 2001-03-29
DOI 10.1039/B008826I
Impact Factor 3.676
Authors

Tomasz Goworek, Czesław Rybka, Jan Wawryszczuk


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Abstract

It was shown that the annihilation of free positrons produces a momentum distribution of annihilating pairs which is narrower for doped pyrene than for pure pyrene. We propose to explain this effect by enhanced annihilation on guest molecules; the enhancement factor for phenanthrene as admixture is of the order of 25. The increased annihilation probability on admixtures is not correlated with the respective effective numbers of electrons participating in annihilation per molecule (Zeff) observed in collisions of slow positrons with free molecules in vacuum.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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