A dynamical effect that arises for a process
when the species
is light (e.g. a hydrogen atom) compared to
. The vibrational excitation of the product
is low, since the light atom
approaches to within the bonding distance of
atom retreats. The energy of reaction is therefore released as repulsion between
, with the result that there is translational excitation of the products.
PAC, 1996, 68, 149
(A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC
on page 171
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook