scholarly journals Distribution of radon activity in the atmosphere above Wzgórza Niemczansko-Strzelinskie (South-WestPoland) and its dependence on uranium and thorium content in the underlying rock and indirect ground basement

2009 ◽  
Vol 48 (1) ◽  
Author(s):  
A. A. Ochmann
Keyword(s):  
Radon Activity ◽  
Thorium Content

scholarly journals Alpha Spectrometry of Radon Short-Lived Progeny in Drinking Water and Assessment of the Public Effective Dose: Results from the Cilento Area, Province of Salerno, Southern Italy

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5840
Author(s):  
Enver Faella ◽  
Simona Mancini ◽  
Michele Guida ◽  
Albina Cuomo ◽  
Domenico Guida
Keyword(s):  
Drinking Water ◽  
Effective Dose ◽  
Health Hazard ◽  
Age Groups ◽  
Internal Exposure ◽  
Threshold Values ◽  
Campania Region ◽  
Radon Activity ◽  
National Regulation ◽  
South Italy

Radon is a naturally occurring radioactive gas present in the hydrosphere, lithosphere and atmosphere abundantly. Its ionizing radiation provides the largest human internal exposure by inhalation and ingestion to natural sources, constituting a serious health hazard. The contribution to total exposure is mainly due to inhalation, as ingestion by food or drinking water is typically very small. However, because of public health concerns, the contributions from all these sources are limited by regulations and remedial action should be taken in the event that the defined threshold values are overcome. In this paper, the first campaign of measurements to control the radon activity concentration in drinking water from public water supplies in the province of Salerno, south Italy, is described. The results represent a main reference for the area, as it was never investigated before. The purpose of this survey was to contribute to data compilation concerning the presence of radon-222 in groundwater in the Campania region and to determine the associated risk for different age groups. The maximum radon activity concentrations and the related total annual public effective dose turned out to be lower than the threshold values (100 Bq/l and 0.1 mSv/y, respectively) indicated by international guidelines and the national regulation, showing that the health risks for public consumption can be considered negligible.

Measurement of radon activity in air using electrostatic collection to the Timepix detector

2013 ◽  
Vol 8 (03) ◽  
pp. C03011-C03011 ◽  
Author(s):  
F Mamedov ◽  
P Čermák ◽  
J Jakůbek ◽  
K Smolek ◽  
I Štekl ◽  
...  
Keyword(s):  
Radon Activity

Daily and seasonal variations in radon activity concentration in the soil air

2014 ◽  
Vol 160 (1-3) ◽  
pp. 222-225 ◽  
Author(s):  
M. M llerova ◽  
K. Holy ◽  
M. Bulko
Keyword(s):  
Seasonal Variations ◽  
Activity Concentration ◽  
Soil Air ◽  
Radon Activity

Thorium Content of Ocean Water

Science ◽  
1958 ◽  
Vol 128 (3317) ◽  
pp. 204-205 ◽  
Author(s):  
W. M. SACKETT ◽  
H. A. POTRATZ ◽  
E. D. GOLDBERG
Keyword(s):  
Ocean Water ◽  
Thorium Content

Radon protection in apartments by wireless radon activity concentration-controlled ventilation

2021 ◽  
Author(s):  
Jörg Dehnert ◽  
Diana Altendorf ◽  
Ralf Trabitzsch ◽  
Hannes Grünewald ◽  
Ralph Geisenhainer ◽  
...  
Keyword(s):  
Activity Concentration ◽  
Radon Activity ◽  
Controlled Ventilation

scholarly journals Measurement of radon activity in soil samples of some selected towns across the Lake Bosumtwi basin, Ghana

2012 ◽  
Vol 35 (2) ◽  
pp. 84
Author(s):  
Charles Kansaana ◽  
AndamBentil Aba ◽  
Eric KoteiT Addision ◽  
OscarKwaku Adukpo ◽  
EmmanuelOfori Darko ◽  
...  
Keyword(s):  
Soil Samples ◽  
Radon Activity

scholarly journals A study of radioactive veins containing rare-earth minerals in the area surrounding the Ilímaussaq alkaline intrusion in South Greenland

1968 ◽  
Vol 76 ◽  
pp. 1-51
Author(s):  
J Hansen
Keyword(s):  
Rare Earth ◽  
Uranium Content ◽  
Radioactive Material ◽  
X Ray ◽  
Quartz Veins ◽  
Alkaline Intrusion ◽  
Rare Earth Minerals ◽  
Small Cracks ◽  
Thorium Content ◽  
Iron Manganese

Radioactive veins containing the rare-earth minerals monazite and bastnaesite are found in tension joints in Precambrian sandstone, granite, lavas and dykes on the eastern side of the alkaline Ilímaussaq intrusion in South Greenland. The veins were formed in several phases. First, small cracks were mineralized with hematite, fluorite, quartz and radioactive material. This was followed by emplacement of brown albititic veins in which albite and opaque material predominate, green veins with a high content of ægirine, white albititic veins, carbonate veins and finally quartz veins. All the vein minerals may be coated by a late iron-manganese oxide. Most often the veins are separate, but they may also occur composite. The veins are from a few millimetres to about three metres wide; most commonly they are one to ten centimetres wide. The radioactivity is mostly due to thorium, but a few veins have a uranium content higher than that of thorium. The thorium content ranges from 60 to 4500 ppm, the uranium from 17 to 1500 ppm. The ratio thorium/uranium ranges from 0.1 to 57.2. The radioactivity is predominantly connected with pigmentary material, thorite, thorianite, monazite and bastnäsite. Other minerals identified in the vein are ægirine, acmite, albite, arfvedsonite, apatite, biotite, calcite, chlorite, eudialyte, fluorite, hematite, lithium mica, mesodialyte, microcline, neptunite, pyrite, quartz and sphalerite. The following constants were calculated from X-ray powder diagrams made with a Guinier-Hagg camera.Bastnäsite: a0 = 7.120 ± 7 x 10-3 Å; C0 = 9.77 ± 2 x 10-2 Å; c0/a0 = 1.372; V0 = 428.96 Å3. Monazite: a0 = 6.780 ± 5 x 10-3 Å; b0 = 7.025 ± 4 x 10-3 Å; C

scholarly journals Indoor radon activity concentration and effective dose rates at schools and thermal spas of Ilgin

2020 ◽  
Vol 35 (4) ◽  
pp. 339-346
Author(s):  
Mehmet Erdogan ◽  
Murat Abaka ◽  
Kaan Manisa ◽  
Hasan Bircan ◽  
Coskun Kus ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Primary Schools ◽  
Indoor Radon ◽  
Reference Level ◽  
Distribution Analysis ◽  
Indoor Radon Concentration ◽  
Radon Activity ◽  
Dose Rates ◽  
Basement Floor ◽  
Effective Doses

Indoor radon activity concentrations and radon doses on the ground floor and basement floor of 19 schools (kindergardens, primary schools, secondary schools, and high schools) and thermal spas of Ilgin district in Konya, have been measured using the AlphaGUARD PQ 2000PRO radon detector, for three days in the first half of 2016. According to the results, while the indoor radon concentration for only one location, in total, is above the Turkish action level of 400 Bqm?3, the values for 10 locations are above the reference level of 100 Bqm?3, recommended by WHO. The calculated annual effective doses for inhalation of the radon in indoor air were also found to be 0.26 ?Sv for the minimum and 4.36 ?Sv for the maximum. The parametric distribution analysis is also performed with 3-parameter Weibull distribution and some remarks are provided on radon concentration activity.

Thorium Content of Stone Meteorites

Science ◽  
1957 ◽  
Vol 126 (3274) ◽  
pp. 612-614
Author(s):  
George L. Bate ◽  
J. R. Huizenga ◽  
Herbert A. Potratz
Keyword(s):  
Thorium Content
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