[nagrom]

This won't work because all particle detectors are noisy. Pretty much all tracking detectors need to use multiple coincidences to determine that a muon has indeed passed by. Individual counts by themselves are not reliable. My past life as a particle physicist included design and build of muon detectors using scintillating plastic and (much more expensive) multi-anode photomultipliers to look at nuclear composition of volumes. Something like an underfunded British version of decision sciences http://www.decisionsciences.com/ :-)