Condensation effects in K-shell excitation and de-excitation of solid neon

Condensation effects in excitation and decay of inner shell electronic states with respect to the isolated atom have been studied for solid neon, in particular excitation energy shifts for the surface and for the bulk, effects of symmetry breaking at the surface, and differential cross section changes of the core decay. For the investigation of the excitation, different probes and experimental techniques including threshold electron spectroscopy and photon stimulated desorption have been used to discriminate bulk and surface, and bound and continuum states, and to extract condensation induced modifications of their properties compared to the isolated atom. In the decay, we focus on changes of the branching ratios into spectator and shake-up/shake-down channels by condensation. We find a slight increase of the shake probability for the bulk, but not for the surface.