HIGH EXPOSURE GAMMA-RAY DOSIMETRY USING PADC DOSIMETERS

Solid state nuclear track detectors have become popular in radiation d osimetry because of their low cost, simplicity and high degree of repr oducibility. Various workers have attempted to use these detectors in high exposure gamma ray dosimetry. The parameter they have studied is the change in optical density with respect to gamma dose. In the prese nt investigation an attempt was made to explore the possibility of usi ng these detectors in evaluating the doses delivered to different mate rials. For this the parameters studied were changes in alpha track dia meter and in optical density as a function of gamma hose, in the dose range 10-120 kGy. The change in total bulk etch as a function of gamma dose, in the dose range 1-50 kGy, and the effect of sandalwood oil on the total bulk etch, were also studied. The calibrated dosemeters wer e used to evaluate the dose delivered to sludge at the Sludge Hygienis ation Research Irradiator (SHRI) established at Vadodara by the Bhabha Atomic Research Centre. (C) 1997 Elsevier Science Ltd.