Jz. Tang et I. Shimamura, DIFFERENTIAL CROSS-SECTIONS FOR PHOTOIONIZATION OF HE, Journal of electron spectroscopy and related phenomena, 79, 1996, pp. 259-261
The angular distribution of photoelectrons from He is studied by a hyp
erspherical close-coupling (HSCC) method. The influence of the doubly
excited states on the asymmetry parameter and differential cross secti
ons for the photoionization of He is investigated. The theoretical res
ults agree very well with experimental data.