Resonant satellite photoemission of atomic Mn

Abstract

The photoelectron spectra and the relative partial photoionisation cross sections of atomic Mn have been determined for photon energies between 45 and 65 eV. Besides the main 3d54s2 6S to 3d44s2(5D) epsilon l, 3d54s(5,7S) epsilon l photoemission lines there are prominent 3d44snl epsilon l satellite photoemission lines which are strongly enhanced in the range of the giant 3p to 3d resonance and the 3p63d54s2 to 3p54s2nl Rydberg transitions. Near the 3p to 3d resonance the partial cross sections of these two-electron satellites behave similarly to that of the 3s54s2 to 3d44s2 epsilon l main line The interference between the 3p63d54s2 6S to 3p53d64s2 6P excitation and the continuum channels manifests itself in the asymmetric profile of the partial cross sections. In contrast to this, the 3d54s2 to 3d54s5L epsilon l partial cross sections can be approximated by the superposition of Lorentzians centred at the 3p63d54s26S to 3p53d64s26D, 6P, 4L excitation energies. The 3d55s epsilon l photoemission only undergoes a single symmetric resonance. All these lines, including the main lines, do not show an enhancement close to the 3p53d54s2 7P ionisation limits. When tuning the photon energy across these ionisation limits post-collision interactions give rise to further satellite lines, and to asymmetric M2,3M4,5N1 Auger lines which, in comparison with the normal Auger lines, are shifted toward higher energies.