A STATISTICAL ANALYSIS OF GRAIN COUNTING IN PHOTOGRAPHIC EMULSIONS

Abstract

Fluctuations in the grain density of tracks of charged particles passing through photographic emulsions are examined in terms of the physical properties of grains and the type of counting convention used. A mathematical model, for one counting convention which takes into account both the frequency distribution of the grains and the frequency distribution of their lengths, yields numerical results in good agreement with experimental data. Other statistical problems of interest in grain counting are discussed.