Reactions of Molecular Ions in Association with Inert Gas Clusters

摘要: For the most part, forces responsible for bonding in clusters are weak van der Waals interactions. It is, therefore, somewhat surprising that even fragile clusters, e.g. Arn, appear capable of forming stable ions when ionized by electrons with impact energies order 70 eV. To account such behaviour, it has been proposed formation Ar n + proceeds through generation high-lying Rydberg states which then autoionize, followed a self-trapping positive charge. The latter process is particularly efficient both liquid and solid argon, arises from comparative stability 2 (2Σu+, Do = 1.3 eV) dimer. Obviously, trapping mechanism leads to an increase internal temperature ion cluster reduces evaporation. Just how many argon atoms lost this cooling difficult estimate; however, there good evidence evaporation on quite large scale continues 10-5 s after formation.