Gamma radiation measurements and dose rates in commercially-used natural tiling rocks (granites)
Christodoulides, George D.
SourceJournal of environmental radioactivity
Google Scholar check
MetadataShow full item record
The gamma radiation in samples of a variety of natural tiling rocks (granites) imported in Cyprus for use in the building industry was measured, employing high-resolution γ-ray spectroscopy. The rock samples were pulverised, sealed in 1-l plastic Marinelli beakers, and measured in the laboratory with an accumulating time between 10 and 14 h each. From the measured γ-ray spectra, activity concentrations were determined for 232Th (range from 1 to 906 Bq kg-1), 238U (from 1 to 588 Bq kg-1) and 40K (from 50 to 1606 Bq kg-1). The total absorbed dose rates in air calculated from the concentrations of the three radionuclides ranged from 7 to 1209 nGy h -1 for full utilization of the materials, from 4 to 605 nGy h -1 for half utilization and from 2 to 302 nGy h-1 for one quarter utilization. The total effective dose rates per person indoors were determined to be between 0.02 and 2.97 mSv y-1 for half utilization of the materials. Applying dose criteria recently recommended by the EU for superficial materials, 25 of the samples meet the exemption dose limit of 0.3 mSv y-1, two of them meet the upper dose limit of 1 mSv y -1 and only one clearly exceeds this limit. © 2003 Elsevier Science Ltd. All rights reserved.
Showing items related by title, author, creator and subject.
A comprehensive study of natural gamma radioactivity levels and associated dose rates from surface soils in Cyprus Tzortzis, M.; Svoukis, E.; Tsertos, Haralambos (2004)A survey was carried out to determine activity concentration levels and associated dose rates from the naturally occurring radionuclides 232Th, 238U and 40K, in the various geological formations of Cyprus, by means of ...
Determination of thorium, uranium and potassium elemental concentrations in surface soils in Cyprus Tzortzis, M.; Tsertos, Haralambos (2004)A comprehensive study was conducted to determine thorium, uranium and potassium elemental concentrations in surface soils throughout the accessible area of Cyprus using high-resolution γ-ray spectrometry. A total of 115 ...
Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks Tzortzis, M.; Tsertos, Haralambos; Christofides, Stelios; Christodoulides, George D. (2003)Using high-resolution gamma-ray spectroscopy, the terrestrial gamma radiation in all the predominant types of geological rock formations appearing in Cyprus was measured. Soil samples were collected from each rock type, ...