%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 Discussions %D 2012 %I Copernicus Publications %R 10.5194/gid-2-643-2012 %X A model experiment was performed in order to evaluate the spatial resolution and accuracy of determining density by utilizing steel blocks whose density (7.8 g cm 3) and geometrical structure (5 m in length and 40 cm in width) were both well known. By comparing the experimental result with simulations, a density and a 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-discuss.net/2/643/2012/gid-2-643-2012.pdf