Positron Binding and Annihilation in Alkane Molecules

Positron Binding and Annihilation in Alkane Molecules

A model-potential approach has been developed to study positron interactions with molecules. Binding energies and annihilation rates are calculated for positron bound states with a range of alkane molecules, including rings and isomers. The calculated binding energies are in good agreement with expe...

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Bibliographic Details
Published in:Physical review letters Vol. 123; no. 11; p. 1
Main Authors: Swann, A. R., Gribakin, G. F.
Format: Journal Article
Language:English
Published: College Park American Physical Society 13-09-2019
Subjects:
Alkanes
Binding energy
Isomers
Online Access:Get full text
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Summary:A model-potential approach has been developed to study positron interactions with molecules. Binding energies and annihilation rates are calculated for positron bound states with a range of alkane molecules, including rings and isomers. The calculated binding energies are in good agreement with experimental data, and the existence of a second bound state for n-alkanes (CnH2n+2) with n≥12 is predicted in accord with experiment. The annihilation rate for the ground positron bound state scales linearly with the square root of the binding energy.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.123.113402