Abstract
H. Carmichael and C.-N. Chou have measured cosmic ray ionization bursts underground and have calculated the rate of production of such bursts by mesons; they obtain fair agreement. Their measurements of bursts at sea-level, however, provide evidence of wide cosmic ray showers which originate in the atmosphere but evidently do not come from mesons. These wide air showers may be of two kinds.
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Points from Foregoing Letters. Nature 144, 334 (1939). https://doi.org/10.1038/144334b0
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DOI: https://doi.org/10.1038/144334b0