Similarity between positronium-atom and electron-atom scattering

TL;DR

This paper uses the impulse approximation to analyze positronium-atom scattering, explaining the observed similarity between positronium and electron scattering cross sections across various targets.

Contribution

It introduces a theoretical framework that accounts for the similarity in scattering cross sections between positronium and electrons for different atomic and molecular targets.

Findings

Theoretical explanation of the similarity in cross sections.

Calculations for Ps-Kr and Ps-Ar collisions.

Supports experimental observations by Brawley et al.

Abstract

We employ the impulse approximation for description of positronium-atom scattering. Our analysis and calculations of Ps-Kr and Ps-Ar collisions provide theoretical explanation of the similarity between the cross sections for positronium scattering and electron scattering for a range of atomic and molecular targets observed by S. J. Brawley et al. [Science 330, 789 (2010)].