When in a chain reaction
there is a net increase in the number of chain carriers
there is said to be chain branching. A simple example of a chain-propagating reaction
leading to chain branching is:
in which there is one chain carrier
(an oxygen atom) on the left and two chain carriers (a hydrogen atom and a hydroxyl
radical) on the right.
PAC, 1996, 68, 149
(A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC
on page 156
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