title: Manifestation of many-electron correlations in photoionization of the K shell of N2
abstract: It is demonstrated theoretically in the random phase approximation (RPA) that due to the intershell many-electron correlations the sigma(*) shape resonance in the photoionization of K shells of the N2 molecule appears not only in the 1sigma(g)-->varepsilonsigma(u) channel as it was believed earlier on the basis of single particle calculations, but in both 1sigma(g)-->varepsilonsigma(u) and 1sigma(u)-->varepsilonsigma(g) channels. As a confirmation of this phenomenon we show that the experimental angular distributions of photoelectrons ejected from fixed-in-space N2 molecules can be reproduced theoretically only after taking into account many-electron correlations.
authors.affiliation: State University of Aerospace Instrumentation, 190000 St. Petersburg, Russia and Photon Factory, Institute of Materials Structure Science (KEK), Oho 1-1, Tsukuba-shi, Ibaraki-ken 305-0801, Japan.
authors.initials: NA
authors.lastname: Cherepkov
authors.initials: SK
authors.lastname: Semenov
authors.initials: Y
authors.lastname: Hikosaka
authors.initials: K
authors.lastname: Ito
authors.initials: S
authors.lastname: Motoki
authors.initials: A
authors.lastname: Yagishita