Evolution of uranium monoxide in femtosecond laser-induced uranium plasmas
- The Pennsylvania State Univ., University Park, PA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Florida, Gainesville, FL (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
We report on the observation of uranium monoxide (UO) emission following fs laser ablation (LA) of a uranium metal sample. The formation and evolution of the molecular emission is studied under various ambient air pressures. Observation of UO emission spectra at a rarefied residual air pressure of ~1 Torr indicates that the UO molecule is readily formed in the expanding plasma with trace concentrations of oxygen present within the vacuum chamber. The persistence of the UO emission exceeded that of the atomic emission; however, the molecular emission was delayed in time compared to the atomic emission due to the necessary cooling and expansion of the plasma before the UO molecules can form.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; US Department of Homeland Security (DHS)
- Grant/Contract Number:
- AC05-76RL01830; NA0002534; 2012.05 DN-130-NF0001
- OSTI ID:
- 1358479
- Alternate ID(s):
- OSTI ID: 1367671; OSTI ID: 1454764
- Report Number(s):
- PNNL-SA-123838; OPEXFF; DN2001000
- Journal Information:
- Optics Express, Vol. 25, Issue 10; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 37 works
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