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, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1536 [Terms] [Paper]
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 154 [Terms] [Paper]