A known amount of element that is simultaneously irradiated with the
test portion in the context of
activation analysis. If one comparator is used (single comparator method), it is essentially identical to a flux monitor (expect that this term is not necessarily linked to
activation analysis).
Source:
PAC, 1994, 66, 2513
(Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994))
on page 2516