1. Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universit?t, Technikerstr. 25, 6020, Innsbruck, Austria
Abstract:
Neon dimer ions undergo spontaneous dissociation (metastable decay) several
microseconds after formation by electron impact ionization of neon clusters.
In this contribution we compare the kinetic energy release distribution
(KERD) of the previously reported isotopomer 20Ne2+ with that
of 22Ne2+. The heavy isotopomer shows the same two components
in the KERD as the lighter ones. However, the high-energy component that is
due to electronic pre-dissociation is reduced in intensity. The decrease is
attributed to a reduced predissociation rate from the II(1/2u) state into
I(3/2u).