Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Radon gas"”.
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In-situ measurements and calculation of radon gas concentration and exhalation from a tailings mine dump
… therefore been identified as large sources of radon (222Rn). Radon release from these tailings dumps pose health concerns for the surrounding communities. This study reports on the 222Rn soil-gas concentrations and exhalations measurements which were conducted at a non-operational mine dump …
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Evaluating Uranium Depth Versus Socio-Economic Statistics for Residential Radon Vulnerability in Warren County, Kentucky
… are characterized by high levels of residential radon, which is one of the radioactive daughter products of uranium. According to the United States Environmental Protection Agency (US EPA), radon exposure causes approximately 22,000 lung cancer deaths in the United States per year. The City of …
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The contribution of construction materials to the airborne radon concentrations in an underground facility
The radon concentrations within fiber crete and the native material from the U1a Complex at the Nevada Tests Site, Nye County, Nevada, were quantified and compared to each other. Gamma spectroscopy measurements resulted in an average 222Rn concentration to be 0.038 +/- 0.0011 and 0.014 +/- 0.001 Bq …
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Development of BJT radiation sensors and read-out systems for Radon detection
… developed and optimized for alpha particle and radon detection and monitoring. Using functional tests, we have shown that BJT detector operated with floating base can efficiently be used for the purpose of alpha-particle and, consequently, radon gas detection. Basing on these results, we have …
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The Relationship Between Soil Radon Concentrations and the Huntingdon Valley Shear Zone, Southeastern Pennsylvania
… is heterogeneous across these units. High soil-radon (222Rn) concentration correlates both with lithology and the magnitude of strain of the bedrock. High concentrations of radon gas {222Rn) were found in soils derived from highly deformed rocks of the Huntingdon Valley shear zone and two other …
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Automatic trajectory generation for mobile-manipulators using 3D LiDAR scans of unknown surfaces
… workers from hazards, such as rock fall and radon gas. Proper application of shotcrete and visual estimation of its thickness require highly skilled operators. This research presents a trajectory generation algorithm that is capable of autonomously applying shotcrete to unknown surface …
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Indoor atmospheric radon in Hamadan, Iran. Atmospheric radon indoors and around Hamadan city in Iran.
Radon gas may be a major air quality hazard issue inside the home. Radon (222Rn) comes from the natural breakdown of radioactive uranium (238U) via radium (226Ra) in soil, rocks, and water. Radon and its progeny contribute more than 50% of the total radiation dose to the human population due to …
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Radon Detection and 241Am-7Li Source Development for the Lux-Zeplin Dark Matter Experiment
… measurement of the release of trace amounts of radon gas from detector materials, forming the dominant background component. This work was important to ensure a low detector background and, with it, high sensitivity to dark matter. As a second contribution, I participated in all phases of the …