Observations on the multiple scattering of ionizing particles in photographic emulsions - Part I. The value of the scattering constant

The theories of multiple scattering of Williams, Molire, Snyder and Scott are briefly surveyed. The results of five independent determinations of the scattering constant for G.5 nuclear research emulsions, details of which are to be presented in the following papers, are compared and discussed. The constant has been found to vary with cell-size and β in a manner which is in agreement with theory. The effect of rejecting large angles due to plural scattering is considered, and also those errors which arise from the presence of spurious scattering