Uranyl fluoride luminescence in acidic aqueous solutions

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:270702

Beitz, J V; Williams, C W ^[1]

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1. Argonne National Lab., IL (United States). Chemistry Div.

Luminescence emission spectra and decay rates are reported for uranyl species in acidic aqueous solutions containing HF or added NaF. The longest luminescence lifetime, 0.269 {+-} 0.006 ms, was observed from uranyl in 1 M HF + 1 M HClO{sub 4} at 296 K and decreased with increasing temperature. Based on a luminescence dynamics model that assumes equilibrium among electronically excited uranyl fluoride species and free fluoride ion, this long lived uranyl luminescence in aqueous solution is attributed primarily to UO{sub 2}F{sub 2}. Studies on the effect of added LiNO{sub 3} or Na{sub 2}WO{sub 4}{center_dot}2H{sub 2}O showed relatively weak quenching of uranyl fluoride luminescence which suggests that high sensitivity determination of the UF{sub 6} content of WF{sub 6} gas should be feasible via uranyl luminescence analysis of hydrolyzed gas samples of impure WF{sub 6}.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 270702
• Report Number(s): ANL/CHM/CP--90258; CONF-960796--6; ON: DE96012804
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ADDITIVES
EMISSION SPECTROSCOPY
HYDROFLUORIC ACID
IMPURITIES
INTEGRATED CIRCUITS
LITHIUM NITRATES
LUMINESCENCE
PERCHLORIC ACID
QUANTITATIVE CHEMICAL ANALYSIS
SODIUM FLUORIDES
SODIUM TUNGSTATES
TUNGSTEN FLUORIDES
URANIUM HEXAFLUORIDE
URANYL FLUORIDES