Abstract

Abstract We have performed an extensive simulation of δ-rays in three dimensions in nuclear emulsions, and applied it to the charge determination of heavy cosmic-ray primaries. We have also made a handy scanning system with the use of a CCD camera incorporated within a microscope, in order to easily obtain the range distribution of δ-rays recorded on a nuclear emulsion plate. Our calculation reproduces the range distribution of δ-rays obtained by our CCD scanning system well, and it is also in agreement with the result obtained at CERN with 16O and 32S beams.

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