Plastic Track Detectors for High Gamma Dose Measurements

This paper describes (a) the calibration of Makrofol-N, LR-115, CR-39, Marofol-E, Daicel, CA80-15, and CN-85 plastic track detectors in the dose range of 103-106 Gy, and (b) applications of these detectors for high gamma dose measurement. These calibrations are based upon the changes produced in (a) the general etching velocity 'Vg' and (b) the average width of the etch pits due to fission fragments after modification by the absorbed gamma dose. The present results show that CN-85 is the most sensitive plastic track detector for gamma dose determination in the above mentioned dose range. The detectors so calibrated have been applied for the estimation of gamma doses near a spent fuel element.