live time

https://doi.org/10.1351/goldbook.L03595
For a measurement, the time during which a radiation measuring assembly is capable of processing events occurring in the
radiation detector
. It equals the clock time minus the integrated resolving or
dead time
(to be distinguished from 'life time').
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2522 [Terms] [Paper]