Abstract
WITH a three-fold coincidence apparatus, counters arranged in a triangle and with a lead plate 1.5 cm. thick placed above the upper counter, I have registered the intensity of a cosmic ray shower during a period of 110 days. The result of these measurements, performed at sea-level, does not show any connexion between the variation of the shower-intensity and the diurnal periodicity of the 2–4 horizontal intensity of the earth's magnetic field, as is the case with vertical coincidences1.
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References
Barnóthy, J., and Forro, M., Z. Phys., 104, 534 (1937).
Priebsch, J. Wiener Ber., 145, 101 (1936).
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FORRÓ, M. Diurnal Variation of Cosmic Ray Shower. Nature 139, 633–634 (1937). https://doi.org/10.1038/139633c0
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DOI: https://doi.org/10.1038/139633c0
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