Dose rate and energy dependency of an electronic personal dosemeter
DOI:
https://doi.org/10.25758/set.474Keywords:
Dose rate, Electronic personal dosemeter, Personal dose equivalent, Radiation energyAbstract
Introduction – The measurement of occupational exposure to radiation doses can be completed with an electronic personal dosemeter that allows a direct reading and alarm function of the received radiation dose. Due to the energy and dose rate dependence already reported for this type of dosemeter, it is intended, with this work, to determine the response linearity of an Electronic Personal Dosemeter and to study its response behavior to the dose rate and radiation energy. Methodology – The electronic personal dosemeter Vertec Bleeper Sv energy dependency was evaluated by its irradiation with 500 μSv from the radionuclides Cobalt – 60 (60C) and Cesium – 137 (137Cs) as well as by the radiation qualities of the Narrow (N) series: N-30, N-40, N-60, N-80, N-100 e N-120. To investigate the dose rate dependency, the intensities of electric current of 1 mA, 5 mA, 10 mA, 15 mA, and 20 mA were applied to the X-ray tube. Results – There is no relationship between the response of the detector and the radiation energy. For energies below 33 keV, there is an underestimation of over 50% of the radiation dose measured but the detector presents a linear response for energies under 100 µSv. A dependency on the dose rate is perceived since as the dose rate increases, the response of the individual monitor decreases. There is a smaller decrease in the radiation qualities of N-30 (1.1%), N-40 (4.1%), and N-120 (20.0%). Conclusion – It is concluded that there is a strong dependence of radiation energy and dose rate on the response of an electronic personal dosemeter.
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