Abstract
RESULTS are given in this communication of the ratio of the number of positively charged to negatively charged muons in the vertical cosmic radiation at Durham (200 ft. above sea-level), in the momentum range 5–1,000 GeV./c. The measurements were made with the Durham cosmic ray spectrograph, which consists of a large electromagnet with layers of Geiger counters and neon flash-tubes as the detecting elements1,2. The measurements used in the present analysis were made by us as part of our work on the determination of the high-energy spectrum2; the results refer to the period November 1959–March 1960. Instrumental bias was reduced by operating with frequent reversals of the magnetic field.
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References
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HAYMAN, P., WOLFENDALE, A. Charge Ratio of High-Energy Cosmic Ray Muons. Nature 195, 166–167 (1962). https://doi.org/10.1038/195166a0
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DOI: https://doi.org/10.1038/195166a0
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