dorsal/arxiv
View SchemaGamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks
| Authors | M. Tzortzis, H. Tsertos, S. Christofides, G. Christodoulides |
|---|---|
| Categories | |
| ArXiv ID | physics/0212099 |
| URL | https://arxiv.org/abs/physics/0212099 |
| Journal | Radiat.Meas. 37 (2003) 221-229 |
Abstract
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, sealed in 1-litre plastic Marinelli beakers, and measured in the laboratory for 24 hours each. From the measured gamma-ray spectra, activity concentrations were determined for Th-232 (range from 1.3 to 52.8 Bq/kg), U-238 (from 0.9 to 90.3 Bq/kg) and K-40 (from 13 to 894 Bq/kg). Elemental concentrations mean values of (2.8 +- 0.7) ppm, (1.3 +- 0.3) ppm and (0.6 +- 0.1) % were extracted, for thorium, uranium and potassium, respectively. Absorbed dose rates in air outdoors were calculated to be in the range of 0.1-50 nGy/h, depending on the geological features, with an overall mean value of (14.7 +- 7.3) nGy/h. The corresponding effective dose rates per person outdoors were estimated to be between 0.1 and 61.4 microSv/y, assuming a 20% occupancy factor.
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"abstract": "Using high-resolution gamma-ray spectroscopy, the terrestrial gamma radiation\nin all the predominant types of geological rock formations appearing in Cyprus\nwas measured. Soil samples were collected from each rock type, sealed in\n1-litre plastic Marinelli beakers, and measured in the laboratory for 24 hours\neach. From the measured gamma-ray spectra, activity concentrations were\ndetermined for Th-232 (range from 1.3 to 52.8 Bq/kg), U-238 (from 0.9 to 90.3\nBq/kg) and K-40 (from 13 to 894 Bq/kg). Elemental concentrations mean values of\n(2.8 +- 0.7) ppm, (1.3 +- 0.3) ppm and (0.6 +- 0.1) % were extracted, for\nthorium, uranium and potassium, respectively. Absorbed dose rates in air\noutdoors were calculated to be in the range of 0.1-50 nGy/h, depending on the\ngeological features, with an overall mean value of (14.7 +- 7.3) nGy/h. The\ncorresponding effective dose rates per person outdoors were estimated to be\nbetween 0.1 and 61.4 microSv/y, assuming a 20% occupancy factor.",
"arxiv_id": "physics/0212099",
"authors": [
"M. Tzortzis",
"H. Tsertos",
"S. Christofides",
"G. Christodoulides"
],
"categories": [
"physics.med-ph",
"nucl-ex",
"physics.soc-ph"
],
"journal_ref": "Radiat.Meas. 37 (2003) 221-229",
"title": "Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks",
"url": "https://arxiv.org/abs/physics/0212099"
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