Abstract
The annealing dependence of the mean track diameter, track density and sensitivity of CR-39 and CN-85 plastic detectors was studied. The annealing process was carried out in water at 100°C and 0°C for CR-39, and at 80°C and 0°C for CN-85. α-Particles of different energies were used to irradiate the samples. The measurements were carried out on samples, annealing before and after irradiation. It was found that the annealing process, after irradiation, increases the relative track density up to 2·6 and 1·8 for CR-39 and CN-85, respectively. It was also observed that the mean track diameters of α-particles increased on annealing for both detectors, the increases ranging between 17 and 25% of the unannealed values. Finally, the sensitivity of CR-39 was found to be greatly reduced when annealed in boiling water.
Published Version
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