The time-dependent approach to reactive scattering is applied to the study of the collinear collisions for the LiH++H system. The reaction LiH++H --> H-2+Li+ is adiabatically confined to the ground electronic state of the LiH2+ system and is highly exoergic (similar to4.2 eV). However, despite the strong energetic gain, the present calculations show that the reactive component is only a negligible outcome of the encounters while the simple inelastic scattering process and the collision-induced dissociation dominate the dynamics. The binding energy of the LiH+ reagent molecule is so weak that the threshold of the triatomic dissociation channels becomes open at a collision energy of only a few tenths of an electronvolt. The total dissociation probabilities are obtained via an accurate computation of all the possible bound-to-bound transition probabilities (reactive and nonreactive) using the quantum time-dependent approach described herein.
Reactive behaviour of the {LiH2}+ system: II. Collision induced dissociation and collinear reaction dynamics of LiH+ + H from quantum time dependent calculations / Bodo, Enrico; Gianturco, Francesco Antonio; R., Martinazzo. - In: JOURNAL OF PHYSICAL CHEMISTRY. A, MOLECULES, SPECTROSCOPY, KINETICS, ENVIRONMENT, & GENERAL THEORY. - ISSN 1089-5639. - STAMPA. - 105:(2001), pp. 10994-11000. [10.1021/jp012344x]
Reactive behaviour of the {LiH2}+ system: II. Collision induced dissociation and collinear reaction dynamics of LiH+ + H from quantum time dependent calculations
BODO, Enrico;GIANTURCO, Francesco Antonio;
2001
Abstract
The time-dependent approach to reactive scattering is applied to the study of the collinear collisions for the LiH++H system. The reaction LiH++H --> H-2+Li+ is adiabatically confined to the ground electronic state of the LiH2+ system and is highly exoergic (similar to4.2 eV). However, despite the strong energetic gain, the present calculations show that the reactive component is only a negligible outcome of the encounters while the simple inelastic scattering process and the collision-induced dissociation dominate the dynamics. The binding energy of the LiH+ reagent molecule is so weak that the threshold of the triatomic dissociation channels becomes open at a collision energy of only a few tenths of an electronvolt. The total dissociation probabilities are obtained via an accurate computation of all the possible bound-to-bound transition probabilities (reactive and nonreactive) using the quantum time-dependent approach described herein.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.