He 2 +
Springer Online Journal Archives 1860-2000
Chemistry and Pharmacology
Summary This work is concerned with the application of a one-channel model to obtaining predissociation lifetimes and transition rates in a system of crossing diabatic states. The calculation focuses on the first shape resonance of the 1σ g 2 2σ g diabatic state of He 2 + , which is relatively stable with respect to tunneling. This resonance predissociates as a result of the 1σ g 2 2σ g state being crossed by the 1σ g 1σ u 2 dissociative diabatic state near the resonance level. We have estimated its predissociation lifetime to be of the order of 10−11 s.
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