A modified adiabatic approach to positron-atom and positron-molecule polarisation potentials: Application to positron-he scattering

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

A novel treatment of short-range correlation effects designed for use in calculating positron-atom and positron-molecule polarisation potentials is presented. The treatment is based on a physically motivated approximation that mimics the effect of the dominant non-adiabatic correction to the adiabatic potential at low scattering energies, namely virtual positronium formation. As an initial test of the method, positron-He scattering phaseshifts, scattering length and differential cross sections have been calculated and found to be in good agreement with accurate results. This method is immediately extendible to positron-molecule collisions and does not require significantly more work than a purely adiabatic treatment.

Original languageEnglish
Pages (from-to)767-776
Number of pages10
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume23
Issue number4
DOIs
StatePublished - Feb 28 1990

Fingerprint Dive into the research topics of 'A modified adiabatic approach to positron-atom and positron-molecule polarisation potentials: Application to positron-he scattering'. Together they form a unique fingerprint.

Cite this