Reactions of uranium hexafluoride photolysis products

Journal Article · Tue Jan 01 00:00:00 EST 1985 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.448791· OSTI ID:6254828

Lyman, J L; Laguna, G; Greiner, N R

This paper confirms that the ultraviolet photolysis reactions of UF/sub 6/ in the B band spectral region is simple bond cleavage to UF/sub 5/ and F. The photolysis products may either recombine to UF/sub 6/ or the UF/sub 5/ may dimerize, and ultimately polymerize, to solid UF/sub 5/ particles. We use four methods to set an upper limit for the rate constant for recombination of k/sub r/<2.0 x 10/sup -12/cm/sup 3/ molecule/sup -1/ s/sup -1/. We measure the rate constant for UF/sub 5/ dimerization to be k/sub d/ = (1.0 +- 0.2) x 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/. The principal method employed in these studies is the use of diode lasers to monitor, in real time, the changes in density of the species UF/sub 6/ and UF/sub 5/ after laser photolysis of the UF/sub 6/ gas sample.

• Research Organization: Los Alamos National Laboratory Los Alamos, New Mexico 87545
• OSTI ID: 6254828
• Journal Information: J. Chem. Phys.; (United States), Vol. 82:1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
URANIUM HEXAFLUORIDE
PHOTOLYSIS
CHEMICAL REACTION KINETICS
DIMERIZATION
POLYMERIZATION
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
DECOMPOSITION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
KINETICS
PHOTOCHEMICAL REACTIONS
REACTION KINETICS
URANIUM COMPOUNDS
URANIUM FLUORIDES
400500* - Photochemistry