A compact detector for the measurement of the cosmic-ray muon charge ratio.

Details A compact detector for the measurement of the cosmic-ray muon charge ratio. A compact detector for the measurement of the cosmic-ray muon charge ratio.

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nimpa.414..205v&link_type=abstract

Nuclear Instruments and Methods in Physics Research, Sect. A, Vol. 414, No. 2 - 3, p. 205 - 217

Physics

13

Muons: Cosmic Rays, Muons: Detectors

Scientific paper

A compact sampling calorimeter is developed and used to measure the ratio between positive and negative muons in the cosmic-ray flux at momenta below 1 GeV/c. The delayed coincidence method is used, based on the reduced mean lifetime of negative muons due to nuclear capture in matter. It is shown that aluminum is a good choice as a capture medium for negative muons and suitable for a simple detector set-up. The muon charge ratio is found to be 1.30±0.05 for a mean momentum of 0.86 GeV/c and over a zenith angle acceptance with Θmean = 26°.

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