radiolysis

https://doi.org/10.1351/goldbook.R05112
The cleavage of one or several bonds resulting from exposure to high-energy radiation. The term is also often used loosely to specify the method of @[email protected] ('pulse radiolysis') used in any radiochemical reaction, not necessarily one involving bond cleavage.
Sources:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1156 [Terms] [Paper]
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2524 [Terms] [Paper]