intrinsic detector efficiency

https://doi.org/10.1351/goldbook.I03136
The ratio of the number of particles or photons detected to the number of similar particles or photons which have struck the envelope limiting the sensitive volume of a @R05054@.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2518 [Terms] [Paper]