spectral photon exitance, Mpλ

https://doi.org/10.1351/goldbook.S05819
The
photon exitance
, Mp, at
wavelength
per unit
wavelength
interval. The SI unit is s1 m3, but a commonly used unit is s1 m2 nm1. Alternatively, the term can be used with the amount of photons (mol or its equivalent
einstein
) the SI unit then being mols1m3 and the common unit mols1m2nm1.
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2275 [Terms] [Paper]