Collinear quantal study of vibrational predissociation and prereaction of van der Waals molecules

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.453219· OSTI ID:6348804

Engel, V; Schinke, R; Pollak, E

It was recently suggested that vibrational excitation of van der Waals molecules could lead to prereaction instead of predissociation. A mechanism for vibrational prereaction based on tunneling of a light atom is proposed and tested. The effect of van der Waals wells on the reactivity of collinear MuD/sub 2/, ClHBr, and ClHCl systems is studied. We find that vibrational prereaction is sensitive to the ratio of tunneling and vibrationally nonadiabatic interaction. If tunneling dominates, prereaction will take place. This is the case for the ClHBr and ClHCl systems. The interplay between reaction probability and photodissociation cross sections is studied. We conclude that vibrational prereaction will lead to an increase in reaction probability and an increase in the formation of products in photodissociation. This study suggests that vibrational prereaction could be observed at least in principle in light atom transfer systems.

• Research Organization: Max-Planck-Institut fuer Stroemungsforschung, D-3400 Goettingen, Federal Republic of Germany
• OSTI ID: 6348804
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 87:3; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640303* -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
ADDUCTS
CHLORINE
DEUTERIUM
DISSOCIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HALOGENS
HYDROBROMIC ACID
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INORGANIC ACIDS
ISOTOPES
LIGHT NUCLEI
MUONIUM
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PREDISSOCIATION
STABLE ISOTOPES
VAN DER WAALS FORCES
VIBRATIONAL STATES