Comprehensive Rate Determinations in an Electronic Intramolecular Collisional Energy Transfer:ΔEandΔJPropensity Rules through a Surprisal Analysis

Extensive studies of a pure electronic transfer B¹Πᵤ→2¹Σg⁺ in lithium dimers colliding with Li atoms enable the rates to some 600 (⁷Li₂) or 400 (⁶Li₂) channels from a single level of B¹Πᵤ to be found. This is the first complete direct analysis of pure electronic transfer in a diatomic molecule. The information-theoretic approach points out the main physical facts and clarifies ΔE and ΔJ propensity rules.