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Full-Text Articles in Physical Sciences and Mathematics
Novel Production Techniques Of Radioisotopes Using Electron Accelerators, Daniel Robert Lowe
Novel Production Techniques Of Radioisotopes Using Electron Accelerators, Daniel Robert Lowe
UNLV Theses, Dissertations, Professional Papers, and Capstones
Non-traditional radioisotope production techniques using a compact, high power linear electron accelerator have been demonstrated and characterized for the production of 18F, 47Sc, 147Pm, and 99mTc from a variety of target candidates. These isotopes are used extensively in the medical field as diagnostic and therapy radioisotopes, as well as the space industry as RTG's. Primary focus was placed on 99mTc as it constitutes approximately 80% of all diagnostic procedures in the medical community that use radioactive tracers. It was also the prime focus due to recent events at the Chalk River nuclear reactor, which caused global shortages of this isotope …
2000 Year Moisture Source Record From A Central Nevada Speleothem, Paul Pribyl
2000 Year Moisture Source Record From A Central Nevada Speleothem, Paul Pribyl
UNLV Theses, Dissertations, Professional Papers, and Capstones
The goal of this study was to determine the moisture source of winter precipitation in the central Great Basin for the past 2000 years, and to elucidate the role of Pacific Ocean and North American climate variability modes in driving observed droughts of the region around the Medieval Climatic Anomaly (MCA, ~900-1300 CE). Here a high resolution (~2-4 year) precisely dated moisture source reconstruction is presented from the δ18O values of speleothem LC-1 collected from Leviathan Cave in central Nevada, which reveals significant δ18O variability. I attribute the δ18O variability to changes in winter-season moisture circulation over the past 2000 …