XeF/sub 2/ photodissociation studies. I. Quantum yields and kinetics of XeF(B) and XeF(C)

Journal Article · Sun Nov 15 04:00:00 EST 1981 · J. Chem. Phys.; (United States)

OSTI ID:6604311

Black, G; Sharpless, R L; Lorents, D C; Huestis, D L; Gutcheck, R A; Bonifield, T D; Helms, D A; Walters, G K

Photodissociation of XeF/sub 2/ with synchrotron light pulses (0.3 ns duration) has been used as the source of the XeF(B, C, and D) excited states. The time-resolved profiles of the intensity of the resulting fluorescence have been recorded and partially analyzed. Most of the measurements were made in the strong XeF/sub 2/ absorption band between 145 and 175 nm. The absorption cross section was redetermined out to 210 nm, with a maximum value of (5.9 +/- 0.5) x 10/sup -17/ cm/sup 2/ at 158 nm. By comparison with O(/sup 1/S) signals from N/sub 2/O photodissociation, quantum yields for XeF B, C, and D state production were determined. Radiative lifetimes of (14 +/- 1) and (100 +/- 10) ns were found for the B and C states. Rate coefficients for quenching by XeF/sub 2/ are reported as are those for converting B to C by collision with Ne, Ar, and N/sub 2/, along with upper limits for quenching of the C state by these gases. 46 references, 5 figures.

• Research Organization: SRI International, Menlo Park, CA
• OSTI ID: 6604311
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 75:10; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
BREMSSTRAHLUNG
COLLISIONS
CROSS SECTIONS
DATA
DISSOCIATION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
INFORMATION
LEVEL WIDTHS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NEON
NITROGEN
NONMETALS
NUMERICAL DATA
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
QUENCHING
RADIATIONS
RARE GAS COMPOUNDS
RARE GASES
SPECTRA
SYNCHROTRON RADIATION
XENON COMPOUNDS
XENON FLUORIDES