Application of the Böhm chamber for reference beta dose measurements and the calibration of personal dosimeters

The appropriate evaluation of measured doses in mixed fi elds requires the calibration of dosimeters in relation to different types of radiation and exposure conditions in order to split the signal into individual components corresponding to the specifi c radiation and exposure conditions of the entire period and evaluate the critical level, lower limit of detection and corresponding uncertainty [1]. The Panasonic UD-813 thermoluminescent dosimeters (TLDs) are used to evaluate mainly the doses related to neutrons but their design is appropriate for their use in the mixed fi eld. Therefore, the dosimeters have to be irradiated to fulfi l these tasks by beta, gamma, neutron and X-ray using the slab phantom or free in the air for environmental dosimetry. The 137Cs gamma sources and 137Sr beta sources that were used to fulfi l the task were mounted on the IM6/M-2 and IB1/P installation, respectively, and the X-ray that could be modifi ed by fi lters recommended by the ISO standard 4037-1:1996 [2] was generated by the XCS-320-ST/X-RAY CAL (320 kV) device. All of these installations, made by TEMA Application of the Böhm chamber for reference beta dose measurements and the calibration of personal dosimeters Krystian Skubacz