Cosmic ray muons at a depth of 754 hg/sq CM in the Kolar Gold Mines

Details Cosmic ray muons at a depth of 754 hg/sq CM in the Kolar Gold Mines Cosmic ray muons at a depth of 754 hg/sq CM in the Kolar Gold Mines

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975prama...5..211k&link_type=abstract

Pramana, vol. 5, Oct. 1975, p. 211-226. Research supported by the Japanese Association for the Promotion of Science and Toray S

Computer Science

2

Angular Distribution, Cosmic Rays, Muons, Particle Flux Density, Radiation Measurement, High Energy Interactions, Kaons, Pions, Scintillation Counters

Scientific paper

A telescope with an area of 4 sq m, consisting of horizontal layers of plastic scintillators, neon flash tubes, and absorbers, was operated at a depth of 754 hg/sq cm in the Kolar Gold Mines of India. Values for the vertical intensities of muons have been obtained from observations of the angular distribution over slant depths between about 750 and 2300 hg/sq cm and are compared with existing measurements. From the angular distribution observed, it is concluded that muons are produced wholly through the decay of pions and kaons up to energies of the order of 1 TeV. A value of 0.3 (plus or minus 0.2) is estimated for the kaon/pion ratio at production for muon energies of about 500 GeV. A decoherence distribution has been obtained for parallel muon events up to distances of the order of 10 m. From this, it is concluded that the average transverse momentum of the parents of muons with energy of about 250 GeV is of the order of 0.3 GeV/c. From an analysis of rock showers, the cross section for inelastic interaction of muons with mean energy of 100 GeV is obtained.

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