APPLIED RADIATION AND ISOTOPES, cilt.179, 2022 (SCI-Expanded)
Activity concentrations of 42 different feldspathic dental ceramic powders were determined using a gamma spectrometer with an HPGe detector. The average U-238, Th-232 and Ra-226 activity concentrations of the specimens were 126 +/- 8 Bq kg(-1), 5.6 +/- 0.5 Bq kg(-1) and 12.7 +/- 1.2 Bq kg(-1), respectively. The average 40K activity was found as 2855 +/- 89 Bq kg(-1) ranging from 2252 +/- 70 Bq kg(-1) to 3522 +/- 110 Bq kg(-1) due to high potassium content in dental ceramics. None of the activity concentration measurements exceeded the limits by EC and ISO.