Peculiarities of the photoionisation cross section of the Mn atom

Abstract

The first consistent random phase approximation with exchange (RPAE) calculation of Mn photoionisation in the giant resonance region is reported. In order to be able to perform these calculations, the atomic electrons were separated into two groups called 'up' and 'down' depending on their spin projection. A satisfactory agreement with experiment has been achieved and the autoionisation nature of the experimentally observed maximum in the cross section is confirmed.