ESR AND TL DOSIMETRY SYSTEMS - COMPARATIVE MEASUREMENTS FOR HUMAN PHANTOM

Mixtures of small fragments of tooth enamel as well as thermoluminesce nce (TL) dosimeters were placed into the tissue-equivalent phantom of the human head with skeleton (approximately at the level of the jaws) and irradiated using Cs-137 low dose-rate gamma therapeutic sources (' SELEKTRON' LDR Cs-137). Phantom, samples of teeth and TL detectors wer e irradiated behind water tank to produce scattered irradiation The sa me irradiation with the same geometry was performed in air too. For ga mma-spectrometry Cs-137 sources with very low activity were used but w ith the same geometry as therapeutic sources. The absorbed dose in ena mel was estimated with the help of ESR spectrometer 'ESP-300 E' (Bruck er). The samples of tooth enamel were partially used for preliminary d ose evaluation by ESR signal before starting of experiment. TL dosimet ry was performed by TL reader model 8800 (HARSHAW) using TL dosimeters calibrated with Cs-137. The paper presents data obtained in comparati ve aspects. Copyright (C) 1996 Elsevier Science Ltd