FIGURE 2.1 Cosmic ray muon intensity as a function of depth, expressed as meters of water equivalent. SOURCE: Reprinted with permission from E.V. Bugaev, A. Misaki, V.A. Naumov, T.S. Sinegovskaya, S.I. Sinegovsky, and N. Takahashi. 1998. Atmospheric muon flux at sea level, underground, and underwater. Physical Review D 58: 054001. Copyright 1998 by the American Physical Society.
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