To study the efficiency of cr-39 based dosimeters

Abstract

In the field of solid state nuclear track detectors (SSNTDs), plastic CR-39 is the highly sensitive track recording material .The studies were carried out to see the effect of concentration of etchant (in the range of 4 to 12 M), different etchant and temperature (in the range 50-82°C) on the bulk etch rate ofCR-39. The reported method for bulk etch rate determined (Henke Benton's method) was modified to remove the absorbed etchant and get better results with high accuracy and reduce the systematic error in bulk etch rate. It was also observed that the saturated etchant decreased the bulk etch rate. Whereas the water absorbed before exposure the detector enhances the bulk etch rate. It was also found that the etchant concentration strongly effected on the alpha track diameters. Bulk etch rate of CR-39 depends upon the absorbed dose by y-rays.