Detection of coloured tracks of heavy ion particles using photographic colour film

A photographic colour film, which was exposed to heavy ions, reveals a colo ured dye image of the ion tracks. Since the colour film consists of several layers and different colours appear on each layer, three-dimensional infor mation on the tracks in the layers can be obtained by the colour image. Pre viously, we have reported the method for which the tracks in different colo urs represented differences of track depth and we also discussed the disadv antages of using commercial colour films. Here we present the procedure for a self-made photographic coating and the development formula which can ove rcome the disadvantages. (C) 2001 Elsevier Science Ltd. All rights reserved .