Semiclassical approximation of the Dirac equation in a central field

Relativistic effects in the many-body theory of extreme multiplicity ion formation in superstrong laser fields

“…The rest of the notations in ( 5) are the same as in (1). We obtained the quasi-classical relativistic formula for the asymptotic form coefficient, C, in [53]. In the present work we use a more accurate value of C that is obtained numerically with the Hartree-Fock-Dirac (HFD) method [54][55][56].…”