branching ratio

The ratio of alternative products formed in a reaction (e.g. the HF / DF ratio in the reaction between F and HD).
PAC, 1996, 68, 149 (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 154
PAC, 1982, 54, 1533 (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1536