Further interactions of the heavy nuclei of the cosmic radiation

Earlier results obtained at Bristol from a study of nuclear interactions produced by heavy nuclei of the primary cosmic radiation passing through nuclear emulsions have been amplified and confirmed. Revised values are given for the fragmentation probabilities and mean free paths which are of greater statistical weight and in good agreement with those reported previously. Values are derived from the fragmentation probabilities in air and in hydrogen which probably represent upper limits to the true values. The implications of the results are discussed.