Same as @R05041@, \(M\). It is the integration of the @R05046@, \(P\), leaving a source over the solid @A00346@ and over the whole @W06659@ range.
Source: PAC, 1996,
68, 2223. (
Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2276 [
Terms] [
Paper]