Quenching rate constants of the Xe(5p{sup 5}6p and 6p{prime}) states and the energy-pooling ionization reaction of Xe(5p{sup 5}6s) atoms

Journal Article · Thu May 11 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100019a034· OSTI ID:50782

Nelson, T O; Setser, D W; Richmann, M K ^[1]

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1. Kansas State Univ., Manhattan, KA (United States)

Two-photon excitation by a pulsed dye laser was used to prepare the Xe(5p{sup 5}6p[1/2]{sub 0}, [3/2]{sub 2}, [5/2]{sub 2}) and Xe(5p{sup 5}6p{prime}[HLF]{sub 0}, [3/2]{sub 2}) states in the presence of several reagent gases to measure total quenching rate constants at 300 K. The new measurements together with rate constants from the literature provide a general overview of Xe(6p) atom reactivity, especially with halogen and oxygen-containing molecules. Reactive quenching and/or excitation transfer to the reagent molecule are the dominant quenching mechanisms, rather than intramultiplet transfer to other states of the Xe(6p) manifold. The XeCl(B D) and XeF(B and D) product state distributions from reactions of the Xe(5p{sup 5}({sup 2}P{sub HLF})6p{prime}) states with HCl, Cl{sub 2}, F{sub 2}, NF{sub 3}, CCl{sub 4}, and CCl{sub 2}F{sub 2} were observed in order to record the degree of conservation of the Xe{sup +}({sup 2}P{sub HLF}) core as indicated by XeCl(D) or XeF(D) formation. Except for the HCl reaction, the Xe{sup +}({sup 2}P{sub HLF}) does not have a high degree of conservation in reactions of Xe(6p{prime}) atoms. For conditions of low reagent pressure, radiative decay of the Xe(6p) states can produce a high local concentration of metastable Xe(6s) atoms, which subsequently undergo bimolecular, energy-pooling, associative-ionization reactions. 41 refs., 12 figs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 50782
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 19 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ACTIVATION ENERGY
ATOMS
CARBON TETRACHLORIDE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINE
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
FLUORINE
HYDROCHLORIC ACID
IONIZATION
XENON
XENON CHLORIDES
XENON FLUORIDES