Relativistic strong-field ionization of hydrogen-like atomic systems in constant crossed electromagnetic fields

TL;DR

This paper investigates relativistic ionization of hydrogen-like atoms in strong crossed electromagnetic fields, formulating a transition amplitude within the strong-field approximation and comparing ionization rates with other theories across various atomic numbers and field strengths.

Contribution

It introduces a relativistic strong-field ionization model using Dirac wave functions and Coulomb corrections, extending previous non-relativistic approaches.

Findings

Calculated ionization rates for different atomic numbers and field strengths.

Compared relativistic predictions with other theoretical models.

Demonstrated the importance of Coulomb corrections in tunneling ionization.

Abstract

Relativistic strong-field ionization of hydrogen-like atoms or ions in a constant crossed electromagnetic field is studied. The transition amplitude is formulated within the strong-field approximation in G\"oppert-Mayer gauge, with initial and final electron states being described by the corresponding Dirac-Coulomb and Dirac-Volkov wave functions, respectively. Coulomb corrections to the electron motion during tunneling are taken into account by adjusting an established method to the present situation. Total and energy-differential ionization rates are calculated and compared with predictions from other theories in a wide range of atomic numbers and applied field strengths.