Krishnaswamy, M. R. ; Menon, M. G. K. ; Narasimham, V. S. ; Ito, N. ; Kawakami, S. ; Miyake, S. (1975) Cosmic ray muons at a depth of 754 hg/cm2 in the Kolar Gold Mines Pramana - Journal of Physics, 5 (4). pp. 211-226. ISSN 0304-4289
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Official URL: http://www.ias.ac.in/j_archive/pramana/5/4/211-226...
Related URL: http://dx.doi.org/10.1007/BF02846589
Abstract
A telescope of area 4 m2, consisting of horizontal layers of plastic scintillators, neon flash tubes and absorbers was operated at a depth of 754 hg/cm2 in the Kolar Gold Mines. New values for the vertical intensities of muons have been obtained from observations of the angular distribution over the slant depths ~750-2300 hg/cm2 and are compared with the existing measurements. From the angular distribution observed, we conclude 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±0.2 is estimated for the K/π ratio at production, for muon energies around 500 GeV. A decoherence distribution has been obtained for parallel muon events up to distances of the order of 10 m. From this we conclude that the average Pt of the parents of muons of energy ~250 GeV is of the order of 0.3 GeV/c. From an analysis of rock showers, we obtain the cross section for inelastic interaction of muons of mean energy 100 GeV as (3.8±1.5)×10-30 cm2/nucleon.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Cosmic Ray Muons; Underground Experiments; Angular Distribution; Inelastic Cross Section of Muons |
ID Code: | 20346 |
Deposited On: | 20 Nov 2010 14:38 |
Last Modified: | 17 May 2016 04:41 |
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