title: Properties of resonant interatomic Coulombic decay in Ne dimers.
abstract: Properties of the interatomic Coulombic decay (ICD) process in Ne dimers have been obtained by tracking the formation of energetic Ne+ ions. The double photoionization cross section, deduced from the Ne+/Ne+ coincidence signal, is dominated by the ICD process and presents a threshold 280 meV below the atomic Ne+2s(-1) threshold. Rydberg excitation of a 2s electron in the dimer creates molecular Rydberg states whose Sigma and Pi symmetries have been resolved. These excited states decay by a resonant ICD process releasing an energetic Ne+ ion and a neutral excited Ne* fragment. Subsequent autoionization of the Ne* fragment explains a double photoionization threshold below the dimer 2s ionization threshold.
authors.affiliation: Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Aoto
authors.forename: K
authors.initials: K
authors.lastname: Ito
authors.forename: Y
authors.initials: Y
authors.lastname: Hikosaka
authors.forename: E
authors.initials: E
authors.lastname: Shigemasa
authors.forename: F
authors.initials: F
authors.lastname: Penent
authors.forename: P
authors.initials: P
authors.lastname: Lablanquie