SEMI-EMPIRICAL CALCULATION FOR IONIZATION OF HELIUM BY ELECTRON IMPACT
Alexandre Pereira Chahad+, Ronaldo Santos Barbieri*
+ Departamento de F=EDsica ,   * Departamento de Quimica
Universidade Federal de Sao Carlos
The Binary-Encounter-Bethe(BEB) model, as proposed by Kim and Rudd in
1994, was extended by Coimbra and Barbieri, in 1997, to obtain doubly
differential cross section (DDCS)_ for the scattering of electrons by
atoms and molecules. In this work, the extended model is employed for He.