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

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