R. Schwienhorst et al., R-MATRIX CALCULATIONS FOR DOUBLE-DIFFERENTIAL CROSS-SECTIONS IN ELECTRON-IMPACT IONIZATION OF HELIUM, Journal of physics. B, Atomic molecular and optical physics, 28(21), 1995, pp. 4651-4658
Double-differential cross sections for electron-impact ionization of h
elium are calculated within the R-matrix method. Angular dependences o
f the cross sections are presented for the primary (scattered) and sec
ondary (ejected) electron for the case where the energy of the primary
electron is large compared to that of the secondary electron at incid
ent energies of 100, 200 and 300 eV. Comparison with experiment and ot
her theories is made and the results are discussed based on the charac
teristics of the angle-integrated triple-differential cross section.