LXV. Light pulses from the night sky

Abstract
Further experimental results are reported on the phenomenon of light pulses from the night sky associated with cosmic rays. The relative frequency of discharge of G.M. counters with distance from the light receiver, comprising a photomultiplier and a parabolic mirror, has been investigated. The differential height distribution of light pulses has been found to be exponential in form, and the intensity of those pulses detected at the rate of about 1 per minute is, very approximately, 3 photons per cm2 per pulse.

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