skip to main content

DOE PAGESDOE PAGES

Title: Evolution of uranium monoxide in femtosecond laser-induced uranium plasmas

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 are 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. Furthermore, 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.
Authors:
 [1] ; ORCiD logo [2] ;  [2] ;  [2] ;  [3]
  1. 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)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Report Number(s):
PNNL-SA-123838
Journal ID: ISSN 1094-4087; OPEXFF; DN2001000
Grant/Contract Number:
AC05-76RL01830; NA0002534; 2012.05 DN-130-NF0001
Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 25; Journal Issue: 10; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20); US Department of Homeland Security (DHS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; optical sensing; plasma diagnostics; emission spectroscopy; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
OSTI Identifier:
1358479
Alternate Identifier(s):
OSTI ID: 1367671; OSTI ID: 1454764