Spin and spatial dynamics in electron-impact scattering off S-wave He using R-matrix with Time-Dependence theory

TL;DR

This paper applies R-matrix with time-dependence theory to study electron-impact scattering off helium, revealing ultra-fast dynamics and spin effects with results matching benchmark data.

Contribution

It introduces a time-dependent R-matrix approach to analyze electron-impact processes in helium, capturing ultra-fast dynamics and spin effects.

Findings

Excellent agreement with benchmark cross sections.

Observation of ultra-fast autoionisation dynamics.

Insight into spin components of the wavefunction.

Abstract

R-matrix with time-dependence theory is applied to electron-impact ionisation processes for He in the S-wave model. Cross sections for electron-impact excitation, ionisation and ionisation with excitation for impact energies between 25 and 225 eV are in excellent agreement with benchmark cross sections. Ultra-fast dynamics induced by a scattering event is observed through time-dependent signatures associated with autoionisation from doubly excited states. Further insight into dynamics can be obtained through examination of the spin components of the time-dependent wavefunction.