Abstract
Abstract Experimental data on track widths in nuclear emulsion are compared with the theoretical distribution of the energy dose around the path of a moving ion. The dose distribution has been calculated following the formalism of the track formation theory developed by Katz and co-workers. The track widths have been estimated from light absorption profiles of heavy ion tracks. The profiles have been recorded with a nuclear track photometer with a narrow slit. The tracks studied were produced by stopping cosmic ray particles with the charges 6, 12, 18, 24, and 26. The measurements cover the residual range interval 0 < R < 1000 μm, implying ion velocities below 0.33 c. Two types of emulsion with different sensitivity, Ilford GS and Ilford K2, have been investigated. The measured track widths in K2 are quite well described theoretically, whereas regarding the measurements in G5 there is some disagreement between experimental and theoretical track widths.
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