Positron Binding and Annihilation in Alkane Molecules

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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.
Original languageEnglish
Article number113402
JournalPhysical Review Letters
Publication statusPublished - 13 Sep 2019


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