Localization of Inner-Shell Photoelectron Emission and Interatomic   Coulombic Decay in Ne$_2$
  We used Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) to investigate the decay of Ne$_2$ after K-shell photoionization. The breakup into Ne$^{1+}$ / Ne$^{2+}$ shows interatomic Coulombic decay (ICD) occurring after a preceding atomic Auger decay. The molecular frame angular distributions of the photoelectron and the ICD electron show distinct, asymmetric features, which imply localization of the K-vacancy created at one of the two atomic sites of the Ne$_2$ and an emission of the ICD electron from a localized site. The experimental results are supported by calculations in frozen core Hartree-Fock approach. 
K. Kreidi, T. Jahnke, Th. Weber, T. Havermeier, R. E. Grisenti, X.   Liu, Y. Morisita, S. Sch\"ossler, L. Ph. H. Schmidt, M....