The effect of bound state dressing in laser assisted radiative recombination

TL;DR

This study investigates how laser dressing of the ionic bound state influences the cross sections and angular distributions in laser-assisted radiative recombination, revealing significant effects at various laser intensities.

Contribution

It introduces a theoretical approach to analyze the impact of bound state dressing on LARR, highlighting its effects on cross sections and emission spectra.

Findings

Bound state dressing significantly affects total cross sections.

Laser dressing causes asymmetries in angular distributions.

Effects are prominent at laser intensities from 10^11 to 10^13 W/cm^2.

Abstract

We present a theoretical study on the recombination of a free electron into the ground state of a hydrogen-like ion in the presence of an external laser field. Emphasis is placed on the effects caused by the laser dressing of the residual ionic bound state. To investigate how this dressing affects the total and angle-differential cross section of laser assisted radiative recombination (LARR) we apply first-order perturbation theory and the separable Coulomb-Volkov-continuum ansatz. Using this approach detailed calculations were performed for low-$Z$ hydrogen like ions and laser intensities in the range from $I_L=10^{11}\text{W/cm}^2$ to $I_L=10^{13}\text{W/cm}^2$. It is seen that the total cross section as a function of the laser intensity is remarkably affected by the bound state dressing. Moreover the laser dressing becomes manifest as asymmetries in the angular distribution and the (energy) spectrum of the emitted recombination photons.