spectral photon exitance, \(M_{\text{p}\lambda}\)

The @P04631@, \(M_{\text{p}}\), at @W06659@ per unit @W06659@ interval. The SI unit is \(\text{s}^{-1}\ \text{m}^{-3}\), but a commonly used unit is \(\text{s}^{-1}\ \text{m}^{-2}\ \text{nm}^{-1}\). Alternatively, the term can be used with the amount of photons (mol or its equivalent @E01914@) the SI unit then being \(\text{mol s}^{-1}\ \text{m}^{-3}\) and the common unit \(\text{mol s}^{-1}\ \text{m}^{-2}\ \text{nm}^{-1}\).
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2275 [Terms] [Paper]