Internal symmetry and selection rules in resonant inelastic soft x-ray scattering
Publikation/Tidskrift/Serie: Journal of Physics B: Atomic, Molecular and Optical Physics
Förlag: IOP Publishing Ltd
Resonant inelastic soft x-ray scattering spectra excited at the dissociative 1 sigma(g) -> 3 sigma(u) resonance in gas-phase O-2 are presented and discussed in terms of state-of-the-art molecular theory. A new selection rule due to internal spin coupling is established, facilitating a deep analysis of the valence excited final states. Furthermore, it is found that a commonly accepted symmetry selection rule due to orbital parity breaks down, as the core hole and excited electron swap parity, thereby opening the symmetry forbidden 3 sigma(g) decay channel.
- Physics and Astronomy
- ISSN: 0953-4075