S. Keller et al., THEORETICAL-ANALYSIS OF THE RELATIVISTIC FIRST-ORDER BORN APPROXIMATION FOR INNER-SHELL (E,2E) PROCESSES, Zeitschrift fur Physik. D, Atoms, molecules and clusters, 37(3), 1996, pp. 191-196
The failure of the first order Born approximation to describe relativi
stic (e,2e) processess that was apparent in previous applications of t
his approach is shown to be related to the use of approximate semirela
tivistic scattering wave functions.