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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 9 of 9 for “"Radon-222"”.
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… Radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) and radon-222, naturally occurring radioactive isotopes produced in sediments, are well-suited as tracers of nutrients, trace metals, and organic matter cycling processes at the sediment-water interface. In this thesis, I have applied radon-222 and the …
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… Radium isotopes (²²³Ra, ²²⁴Ra, ²²⁶Ra, ²²⁸Ra) and radon-222, naturally occurring radioactive isotopes produced in sediments, are well-suited as tracers of nutrients, trace metals, and organic matter cycling processes at the sediment-water interface. In this thesis, I have applied radon-222 and the …
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Quality Assurance Testing, and Sensitivity Studies for the SNO+ Experment
… scintillator as an indirect measurement of radon-222 contamination from air exposure during transport. The technique can measure ppm order oxygen contamination with a resolution of ~60ppm. In addition, the impact of non- gaussian tails in the energy response function on the half-life limit …
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Hydrological and biogeochemical cycling along the Greenland ice sheet margin
… of a naturally occurring radioisotope (radon-222) as a quantitative tracer for waters stored at the glacier bed, and (b) the seasonal evolution of the subglacial drainage network from a delayed-flow to a quick-flow system. Model results also provide the necessary hydrological context to …
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The Effects of Radon and its Progeny on Human Skin Cells
Radon-222 is a naturally occurring radioactive gas released from granite rock and uranium-rich soil. High levels are found in Southwest England due to local geology. Radon is known to cause lung cancer, therefore its potential role in skin carcinogenesis is of interest, as Southwest England also …
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Hydrological and biogeochemical cycling along the Greenland ice sheet margin
… of a naturally occurring radioisotope (radon-222) as a quantitative tracer for waters stored at the glacier bed, and (b) the seasonal evolution of the subglacial drainage network from a delayed-flow to a quick-flow system. Model results also provide the necessary hydrological context to …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
… estimates derived from radium isotopes and from radon-222. It is clear that these tracers reflect different components of the total SGD. The fluxes of low-Δ14C and of 222Rn were dominated by artesian discharge. Estuarine 226Ra showed strong artesian influence, but also reflected the salt water …
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Salinity, radon, and radon precursors in the soils of Grand Forks County, North Dakota
<p>High levels of indoor radon have been observed in many areas of the Red River Valley and particularly in Grand Forks County of North Dakota. Data from the University of North Dakota (UND) Radon Monitoring Facility indicated more than 80% of the dwellings tested had radon levels greater than the …
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Study of the use of Electret Ion chambers as radom dosimeters in South Africa
Radon is a naturally occuring radioactive gas which has been shown to be a major contribution to background dose. The underground mines in South Africa present a major occupational hazard. A need for cheap personal monitoring has been identified. In this thesis, commercially available electret ion …