Manifestation of Many-Electron Correlations in Photoionization of theKShell ofN2

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 ${\mathrm{N}}_2$ molecule appears not only in the $1{\sigma }_g\to \varepsilon {\sigma }_u$ channel as it was believed earlier on the basis of single particle calculations, but in both $1{\sigma }_g\to \varepsilon {\sigma }_u$ and $1{\sigma }_u\to \varepsilon {\sigma }_g$ channels. As a confirmation of this phenomenon we show that the experimental angular distributions of photoelectrons ejected from fixed-in-space ${\mathrm{N}}_2$ molecules can be reproduced theoretically only after taking into account many-electron correlations.