Obtained after correcting for instrumental and sample effects and usually represented by a graph of Φ λ against wavelength, where Φ λ is the spectral (radiant) energy flux.
Source:
PAC, 1984, 56, 231. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-Part VI: molecular luminescence spectroscopy' on page 242 (https://doi.org/10.1351/pac198456020231)