Abstract
The absorption spectrum of atomic uranium has been observed in furnace1 flash discharge2 and flash photolysis2 experiments. Furnace absorption requires high temperatures (ca. 2300°C), so that the lines are relatively wide and many levels are populated. More important, uranium liquid and vapor are extremely reactive, making furnace design and lifetime critical factors. For quantitative line intensity studies in a furnace, it is also difficult to determine the atomic uranium concentration. The flash discharge experiment in UF6, while producing uranium quite suitable for high resolution absorption spectroscopy, is not well suited for quantitative studies of line strengths.

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