Muon intensities and angular distributions deep underground

Menon, M. G. K. ; Naranan, S. ; Narasimham, V. S. ; Hinotani, K. ; Ito, N. ; Miyake, S. ; Creed, D. R. ; Osborne, J. L. ; Pattison, J. B. M. ; Wolfendale, A. W. (1967) Muon intensities and angular distributions deep underground Proceedings of the Physical Society, 90 (3). pp. 649-656. ISSN 0370-1328

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Recent measurements of the intensity of muons below 3000 m.w.e. (metres water equivalent) underground have been combined to give an estimate of the depth-intensity relation and the angular distribution for atmospheric muons down to a maximum depth of approximately 9000 m.w.e. It is found that the vertical intensity can be represented by the expression I(0, h) = 9.8 × 10-7 exp(-h/λ)cm-2sec-1sterad-1 where h is the depth in m.w.e. and λ = 810 ± 50 m.w.e. The corresponding angular distribution at vertical depth h is given by I(θ, h) = I(0, h) secθ exp{-(h/λ)(secθ - 1)} where θ is the zenith angle. The implication of the above angular distribution for the estimate of neutrino fluxes in deep underground cosmic-ray experiments is discussed.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
ID Code:20333
Deposited On:20 Nov 2010 14:39
Last Modified:13 Jul 2012 09:50

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