The passage of muons through matter is mostly affected by their Coulomb
interactions with electrons and nuclei. The muon interactions with electrons
lead to continuous energy loss and stopping of muons, while their scattering
off nuclei lead to angular 'diffusion'. By measuring both the number of stopped
muons and angular changes in muon trajectories we can estimate density and
identify materials. Here we demonstrate the material identification using data
taken at Los Alamos with the Mini Muon Tracker.Comment: 10 pages, 9 figures, Accepted to AIP Advance
