Abstract
In full agreement with the results of Biswas, Peters and Rama (1) further evidence is presented on a new form of noise in scattering measurements in nuclear emulsions, which is supposed to be produced by small dislocations in the emulsion and appears to be found in every kind of emulsion. As its mean sagitta increases about proportional to the cell length, it can be mistaken for true Coulomb scattering and affects scattering measurements at pβ > 2 GeV/c very seriously. As a possible consequence the mean energy leading to a given multiplicity of shower particles seems to have been greatly underestimated. The effect could give furthermore a bias towards low mass values at mass determinations of particles of high energies by the scattering-ionization method. The ratio of third to second differences was found to be 1.45 ± ±0.034, also not far from the value 1.30 given for Coulomb scattering.
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