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ELUCIDATING URANIUM MONOXIDE SPECTRAL FEATURES FROM A LASER-PRODUCED PLASMA

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.26.020319· OSTI ID:1542064

Uranium, because of its pyrophoricity, oxidizes rapidly in an oxygen-containing high-temperature environment. However, so far, the identification of UO emission from a laser-produced plasma system is limited to a spectral feature around 593.55 nm. The aim of this study is to elucidate UO emission features in the visible spectral regime from uranium plasmas generated in an oxygen-containing ambient environment. The plasmas are produced by focusing nanosecond laser pulses on a uranium metal target in a controlled ambient environment. Space- and time-resolved optical emission spectroscopic investigations are used for isolating U molecular emission structures from crowded U atomic line emission. Our studies highlight that the emission from a U plasma even in the presence of trace oxygen is accompanied by a strong background-like emission with partially resolved bands from uranium monoxide and higher oxides. We also report several UO spectral emission bands in the visible spectral region.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1542064
Report Number(s):
PNNL-SA-135059
Journal Information:
Optics Express, Journal Name: Optics Express Journal Issue: 16 Vol. 26
Country of Publication:
United States
Language:
English

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