INTERPLAY OF EXCHANGE AND COLLISIONAL IONIZATION MECHANISMS IN (E,2E)PROCESSES

In this work the multiply-differential cross section for electron-impa ct ionization is considered. A coplanar, equal-energy, fixed-relative angle kinematics is chosen and the particular case where the scattered and ionized electrons emerge perpendicular to each other is emphasize d. It is shown how new structures arise in the spin non-resolved cross sections due to an interplay between single-binary collisions and the ratio of singlet to tripler scattering. We deduce that the angular be haviour of these structures in the spin non-resolved cross sections gi ves a direct hint as to the spin states occupied by the escaping elect rons.