The structures of mixed argon-nitrogen clusters of different compositions are
investigated by analyzing core level shifts and relative intensities of
surface and bulk sites in the Ar 2p 3/2 regime in soft X-ray photoelectron
spectroscopy. These structures are confirmed by core level shift calculations
taking induced dipole interactions into account, in which several model
structures of the mixed clusters are considered by Monte Carlo simulations.
These results suggest that the mixed argon-nitrogen clusters show partial
core-shell structures, where an argon core is partially covered by nitrogen
molecules
