Classical treatments of the L-shell ionization probability at zero impact parameter

Ionization probability for multiple ionization: An assessment of the geometrical model

“…Subsequent to the development of the quantum mechanical plane-wave Born approximation (PWBA, Merzbacher and Lewis, 1958) and the SCA (Bang and Hansteen, 1959), as reviewed by Lapicki (1988), Gryzin´ski (1965a-c) revived the classical approach of Thomson (1912) of the BEA in which the ionization cross-section of an S-shell electron by an ion of atomic number Z 1 and velocity v 1 could be calculated in a closed form…”