Radiation effects on some dyes in non-aqueous solvents and in some polymeric films

Different dyes solutions with suitable concentrations were subjected to increasing gamma irradiation doses and the colour bleaching of the solutions was followed spectrophotometrically. The results obtained showed good linear relationships in the percent colour bleaching vs, irradiation dose plot in most of the systems. The data were used to compare the sensitivity of the different dyes to gamma irradiation. The applicability range and sensitivity of the different dyes in solutions for chemical dosimetry purposes is reported. Several polymer films containing different dyes were also tested. Some remained unaffected by radiation up to doses of about 120 kGy, but others had sensitivities that might allow their use as dosimeters in the kGy range. (C) 2001 Elsevier Science Ltd. All rights reserved.