Abstract
OBSERVATIONS are recorded by A. C. B. Lovell and J. G. Wilson of the frequency with which cosmic ray showers from the atmosphere affected two cloud chambers operated simultaneously and arranged in different ways. From the average multiplication observed when lead or aluminium is interposed between the chambers, they conclude that large showers will be relatively more frequent in light elements than is indicated by the cascade theory applied to a single entrant particle.
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Points from Foregoing Letters. Nature 144, 869 (1939). https://doi.org/10.1038/144869b0
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DOI: https://doi.org/10.1038/144869b0