%0 Journal Article %T Evaluation of positioning and density profiling accuracy of muon radiography by utilizing a 15-ton steel block %A H. K. M. Tanaka %J Geoscientific Instrumentation, Methods and Data Systems (GI) & Discussions (GID) %D 2013 %I Copernicus Publications %R 10.5194/gi-2-79-2013 %X A model experiment was performed in order to evaluate the spatial resolution and the accuracy of determining the density by utilizing a steel block. The steel block (7.8 g cm 3) is 5 m thick along the muon trajectories and weighs about 15 t. By comparing the experimental result with simulations, the density and the width of the steel block were measured as 7.3 ¡À 1.0 g cm 3 and 37 ¡À 15 cm, respectively. %U http://www.geosci-instrum-method-data-syst.net/2/79/2013/gi-2-79-2013.html