fast neutrons

https://doi.org/10.1351/goldbook.F02329
Neutrons of @K03402@ greater than some specified value. This value may vary over a wide range and will be dependent upon the application.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2522 [Terms] [Paper]