Exchange and correlations in Ps-atom and Ps-molecule scattering

Last updated April 26, 2018 by Alessandro Ferraro

Monday, April 16th 2018, 04:00 PM, MAP/0G/017

Speaker: I. Fabrikant (University of Nebraska)

Abstract: Exchange and correlations play an essential role in positronium (Ps) collisions with atom and molecules, since the static potential for Ps interaction with a neutral system is zero. Theoretical description of both effects is a very challenging task. In the present work we use the free-electron-gas model to describe exchange and correlations in Ps collisions with molecules similar to the approach widely used in the theory of electron-molecule collisions. The results for exchange and correlation energies are presented as functions of the Fermi momentum of the electron gas and the Ps incident energy. Using the Thomas-Fermi model, these functions can be converted into exchange and correlation potentials for Ps interaction with molecules as functions of the distance between the projectile and the target.


We are a Research Cluster of the School of Mathematics and Physics at Queen’s University Belfast in Northern Ireland. Our research interests are focused primarily on computational and theoretical physics.

Old Physics Building

The Old Physics Building,
where CTAMOP is situated.