Hp(10) Dose Response in Comparative Testing of Commercial TLD and OSLD against Gamma and X-Ray

Abstract

The employers shall be responsible for making arrangements for the assessment of the occupational exposure of workers, based on individual monitoring where appropriate. The individual monitoring service using passive dosimeters namely thermoluminescence dosimeter (TLD) and optically stimulated luminescence dosimeter (OSLD) is one of the means for fulfilling this regulatory requirement. This study described the dose-response of H p (10) to gamma 137 Cs and X-ray 80 kV on TLD-900, TLD-700, and OSLD as commercial dosimeters as well as its criteria acceptability based on General Safety Guide No. GSG-7. Several 24 dosimeters for each type of TLD-900, TLD-700, and OSLD were prepared. Each type of dosimeter was divided into 6 groups, namely Gamma 1, Gamma 2, Gamma Control, X-ray 1, X-ray 2. and the X-ray Control of which each consist of 4 dosimeters. All dosimeters were annealed, badged, labeled, and sent to the Secondary Standard Dosimetry Laboratory (SSDL) for exposure to 137 Cs gamma and 80 kV X-rays according to its protocol. After being exposed they were read using TLD reader and OSLD Microstar Reader. Then the dose-response of H p (10) was analyzed. The study showed that TLD-900 was the best used for personnel dose monitoring of H p (10) at 137 Cs gamma followed by OSLD and TLD-700. However, personnel monitoring dose for 80 kV X-ray exposure, TLD-700 was the best followed by OSLD and lastly TLD-900. In this comparative testing, the ratio of H p (10) Meas to H p (10) Exp at 137 Cs gamma and 80 kV X-ray for TLD-900, OSLD, and TLD-700 is included in the acceptance criteria of the trumpet curve.