dorsal/arxiv
View SchemaGamma radiation measurements and dose rates in commercially-used natural tiling rocks (granites)
| Authors | M. Tzortzis, H. Tsertos, S. Christofides, G. Christodoulides |
|---|---|
| Categories | |
| ArXiv ID | physics/0212104 |
| URL | https://arxiv.org/abs/physics/0212104 |
| Journal | J.Environ.Radioact. 70 (2003) 223-235 |
Abstract
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 gamma-ray spectroscopy. The rock samples were pulverized, sealed in 1 litre plastic Marinelli beakers, and measured in the laboratory with an accumulating time between 10 and 14 hours each. From the measured gamma-ray spectra, activity concentrations were determined for Th-232 (range from 1 to 906 Bq/kg), U-238 (from 1 to 588 Bq/kg) and K-40 (from 50 to 1606 Bq/kg). The total absorbed dose rates in air calculated from the concentrations of the three radionuclides, Th-232 and U-238 series and K-40, ranged from 7 to 1209 nGy/h for full utilization of the materials, from 4 to 605 nGy/h for half utilization and from 2 to 302 nGy/h for one quarter utilization. The total effective dose rates per person indoors were determined to be between 0.02 to 2.97 mSv/y 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, two of them meet the upper dose limit of 1 mSv/y and only one exceeds clearly this limit.
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"abstract": "The gamma radiation in samples of a variety of natural tiling rocks\n(granites) imported in Cyprus for use in the building industry was measured,\nemploying high-resolution gamma-ray spectroscopy. The rock samples were\npulverized, sealed in 1 litre plastic Marinelli beakers, and measured in the\nlaboratory with an accumulating time between 10 and 14 hours each. From the\nmeasured gamma-ray spectra, activity concentrations were determined for Th-232\n(range from 1 to 906 Bq/kg), U-238 (from 1 to 588 Bq/kg) and K-40 (from 50 to\n1606 Bq/kg). The total absorbed dose rates in air calculated from the\nconcentrations of the three radionuclides, Th-232 and U-238 series and K-40,\nranged from 7 to 1209 nGy/h for full utilization of the materials, from 4 to\n605 nGy/h for half utilization and from 2 to 302 nGy/h for one quarter\nutilization. The total effective dose rates per person indoors were determined\nto be between 0.02 to 2.97 mSv/y for half utilization of the materials.\nApplying dose criteria recently recommended by the EU for superficial\nmaterials, 25 of the samples meet the exemption dose limit of 0.3 mSv/y, two of\nthem meet the upper dose limit of 1 mSv/y and only one exceeds clearly this\nlimit.",
"arxiv_id": "physics/0212104",
"authors": [
"M. Tzortzis",
"H. Tsertos",
"S. Christofides",
"G. Christodoulides"
],
"categories": [
"physics.med-ph",
"nucl-ex",
"physics.soc-ph"
],
"journal_ref": "J.Environ.Radioact. 70 (2003) 223-235",
"title": "Gamma radiation measurements and dose rates in commercially-used natural tiling rocks (granites)",
"url": "https://arxiv.org/abs/physics/0212104"
},
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