average number of radicals per particle

symbols: $\lt\!N\!\gt$, $\bar N$
https://doi.org/10.1351/goldbook.14356
Ratio of the total number of radicals in particles to the number of particles.
Source:
PAC, 2011, 83, 2229. (Terminology of polymers and polymerization processes in dispersed systems (IUPAC Recommendations 2011)) on page 2246 [Terms] [Paper]