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Title: Formation of 238U16O and 238U18O observed by time-resolved emission spectroscopy subsequent to laser ablation

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4991824· OSTI ID:1414346
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Illinois, Urbana-Champaign, IL (United States). Illinois Applied Research Inst.
  3. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Nuclear, Plasma, and Radiological Engineering

Here, we have measured vibronic emission spectra of an oxide of uranium formed after laser ablation of the metal in gaseous oxygen. Specifically, we have measured the time-dependent relative intensity of a band located at approximately 593.6 nm in 16O2. This band grew in intensity relative to neighboring atomic features as a function time in an oxygen environment but was relatively invariant with time in argon. In addition, we have measured the spectral shift of this band in an 18O2 atmosphere. Based on this shift, and by comparison with earlier results obtained from free-jet expansion and laser excitation, we can confirm that the oxide in question is UO, consistent with recent reports based on laser ablation in 16O2 only.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; Defense Threat Reduction Agency (DTRA)
Grant/Contract Number:
AC52-07NA27344; HDTRA1-16-1-0020
OSTI ID:
1414346
Alternate ID(s):
OSTI ID: 1371790
Report Number(s):
LLNL-JRNL-729818; TRN: US1800682
Journal Information:
Applied Physics Letters, Vol. 111, Issue 3; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (5)

Gas Phase Chemical Evolution of Uranium, Aluminum, and Iron Oxides journal July 2018
Optical spectroscopy of laser-produced plasmas for standoff isotopic analysis journal June 2018
Simulation of uranium plasma plume dynamics in atmospheric oxygen produced via femtosecond laser ablation journal August 2018
Plume dynamics and gas-phase molecular formation in transient laser-produced uranium plasmas journal August 2019
Laser-produced uranium plasma characterization and Stark broadening measurements journal September 2019