Pv. Litvinov et Vp. Tishkovets, Light absorption coefficients for randomly oriented clusters of spherical particles in the double-scattering approximation, OPT SPECTRO, 86(1), 1999, pp. 87-90
Relatively simple approximate formulas describing the light absorption coef
ficients for randomly oriented clusters of spherical particles are obtained
. Approximate and exact values of absorption coefficients for clusters cons
isting of touching particles are compared for different values of refractiv
e index, particle size, and number of particles in a cluster.