Abstract
The radioactivity of 15 kinds of different granites collected in Tunisia was determined by gamma-ray spectrometry using hyper-pure germanium (HPGe) detector. The average activity concentrations for primordial radionuclides 238U, 232Th and 40K were respectively 33.24, 8.01 and 116.98 Bq/kg. The activity concentrations ranged from 3.59 to 87.37 Bq/kg for 238U, from 0.45 to 25.34 Bq/kg for 232Th and from 24.06 to 380.23 Bq/kg for 40K. The measured activity concentrations were used to assess of the radium equivalent activity ranged from 22.2 to 995.8 Bq/kg, the absorbed dose rate in air from 7 to 1209 nGy/h and the internal (0.1 to 2.8) and external (0.1 to 2.7) hazard indices. The data obtained in this study may be useful for natural radioactivity mapping.
Highlights
IntroductionNatural radioactive materials (rocks, soil, sediment, water and aliment) contain low-level radioactivity
The radioactivity of 15 kinds of different granites collected in Tunisia was determined by gamma-ray spectrometry using hyper-pure germanium (HPGe) detector
Natural radioactivity of 15 samples of marbles collected in Tunisia was determined by gamma-ray spectrometry using hyper-pure germanium (HPGe) detector
Summary
Natural radioactive materials (rocks, soil, sediment, water and aliment) contain low-level radioactivity. The inhalation of its short-lived daughter products is a major contributor to the total radiation dose
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