title: Vibrationally Inelastic Collision Between Li2(ν = 0) and Li: Direct and Postponed Elongation Mechanisms.
abstract: The mechanism for vibrational inelastic excitation during the collision between Li2(ν = 0) and Li was investigated exploiting classical trajectory simulations over a potential energy surface generated by fitting valence full configuration interaction calculations employing a large basis set. From the trajectory results, it emerges that the vibrational excitation in noncapture collisions presents uniquely a forward-scattered projectile for the highest levels of excitation (ΔE(0 → ν') ≃ Ecoll). For lower ν', a minor contribution presenting a backward-scattered projectile appears, which, however, has its major contribution coming from a "slingshot"-like (orbiting) mechanism exploiting the attractive features of the Li3 potential energy surface rather than a direct recoil.
authors.affiliation: Dipartimento di Scienza ed Alta Tecnologia, Università dell'Insubria , via Valleggio 11, 22100 Como, Italy.
authors.forename: Giorgina
authors.initials: G
authors.lastname: Corongiu
authors.affiliation: Dipartimento di Scienza ed Alta Tecnologia, Università dell'Insubria , via Valleggio 11, 22100 Como, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Mella