Differential cross sections for K-shell ionization by electron or positron impact

TL;DR

This paper explores the universal scaling of differential cross sections for K-shell ionization caused by electron or positron impacts, using non-relativistic perturbation theory, revealing interference effects at low energies.

Contribution

It introduces a theoretical analysis of K-shell ionization cross sections for electrons and positrons, highlighting interference oscillations and applicability to various atomic targets.

Findings

Interference oscillations observed in low-energy positron scattering

Universal scaling behavior identified for different atomic targets

Results applicable to moderate nuclear charge atoms

Abstract

We have investigated the universal scaling behavior of differential cross sections for the single K-shell ionization by electron or positron impact. The study is performed within the framework of non-relativistic perturbation theory, taking into account the one-photon exchange diagrams. In the case of low-energy positron scattering, the doubly differential cross section exhibits prominent interference oscillations. The results obtained are valid for arbitrary atomic targets with moderate values of nuclear charge number Z.