Article révisé par les pairs
Résumé : The unitarised eikonal-Born series (UEBS) method is used to analyse higher order effects for the (e, 2e) reaction in atomic hydrogen, in the coplanar asymmetric geometry. Detailed calculations have been performed at incident electron energies of 150 eV and 250 eV. Our UEBS results are compared with those obtained from other theoretical methods (first Born, EBS, EBS', Glauber and many-body Wallace approximations). Our results indicate that higher order terms are unimportant in the cases investigated. © 1985.