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This content will become publicly available on October 12, 2018

Title: A model of early formation of uranium molecular oxides in laser-ablated plasmas

Here, in this work, we present a newly constructed U xO y reaction mechanism that consists of 30 reaction channels (21 of which are reversible channels) for 11 uranium molecular species (including ions). Both the selection of reaction channels and calculation of corresponding rate coefficients is accomplished via a comprehensive literature review and application of basic reaction rate theory. The reaction mechanism is supplemented by a detailed description of oxygen plasma chemistry (19 species and 142 reaction channels) and is used to model an atmospheric laser ablated uranium plume via a 0D (global) model. Finally, the global model is used to analyze the evolution of key uranium molecular species predicted by the reaction mechanism, and the initial stage of formation of uranium oxide species.
Authors:
ORCiD logo [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2]
  1. University of Illinois at Urbana-Champaign, IL (United States). Department of Nuclear, Plasma, and Radiological Engineering
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-739588
Journal ID: ISSN 0022-3727
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. D, Applied Physics
Additional Journal Information:
Journal Volume: 50; Journal Issue: 48; Journal ID: ISSN 0022-3727
Publisher:
IOP Publishing
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma chemistry; kinetic modeling; atmospheric pressure plasma; uranium fractionation; laser ablation
OSTI Identifier:
1426094