Electronic quenching rate constants of KrF([ital B],[ital C]) and Kr[sub 2]F*

Journal Article · Sun Aug 15 00:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465222· OSTI ID:6130166

Xu, J; Gadomski, W; Setser, D W ^[1]

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1. Department of Chemistry, Kansas State University, Manhattan, Kansas 66506 (United States)

The laser-assisted reaction between Kr and F[sub 2] was used to generate KrF([ital B],[ital C]) molecules during a 7 ns laser pulse in a stainless steel cell. The first-order decay rates of the collisionally coupled KrF([ital B]) and KrF([ital C]) states in [ge]50 Torr of Kr buffer gas were monitored by the KrF([ital B]--[ital X]) fluorescence in the presence of added reagents at 300 K. Two-body quenching rate constants for KrF([ital B],[ital C]) by diatomic and polyatomic molecules and the rare gases were determined from the pressure dependence of the first-order decay constants of KrF([ital B],[ital C]). The mixed three-body quenching rate constants (with Kr) for added He, Ne, and Ar were also measured. For Kr pressure above 200 Torr, Kr[sub 2]F(4 [sup 2][Gamma]) molecules were formed via three-body quenching of KrF([ital B],[ital C]), and the quenching rate constants for Kr[sub 2]F(4 [sup 2][Gamma]) by the same set of reagents were determined. The general trends in the quenching constants for KrF([ital B],[ital C]) and Kr[sub 2]F(4 [sup 2][Gamma]) are similar to those for XeCl([ital B],[ital C]) and Xe[sub 2]Cl(4 [sup 2][Gamma]), respectively; however, the rate constants for KrF([ital B],[ital C]) and Kr[sub 2]F(4 [sup 2][Gamma]) are generally larger than for the corresponding xenon chloride molecules. Quenching mechanisms for KrF([ital B],[ital C]) and Kr[sub 2]F(4 [sup 2][Gamma]) are discussed.

• OSTI ID: 6130166
• Journal Information: Journal of Chemical Physics; (United States), Vol. 99:4; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHEMICAL REACTIONS
KRYPTON FLUORIDES
FLUORINE
KRYPTON
RELAXATION
ARGON
ATOM-MOLECULE COLLISIONS
BUFFERS
EXCIMER LASERS
FLUORESCENCE
HELIUM
INERTIAL CONFINEMENT
LASERS
MODIFICATIONS
MONITORING
NEON
POLYATOMIC MOLECULES
PRESSURE DEPENDENCE
REAGENTS
STAINLESS STEELS
TEMPERATURE RANGE 0273-0400 K
THREE-BODY PROBLEM
TWO-BODY PROBLEM
XENON CHLORIDES
ALLOYS
ATOM COLLISIONS
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
CONFINEMENT
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GAS LASERS
GASES
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
KRYPTON COMPOUNDS
LUMINESCENCE
MANY-BODY PROBLEM
MOLECULE COLLISIONS
MOLECULES
NONMETALS
PLASMA CONFINEMENT
RARE GAS COMPOUNDS
RARE GASES
STEELS
TEMPERATURE RANGE
XENON COMPOUNDS
400201* - Chemical & Physicochemical Properties
700411 - Inertial Confinement Devices- (1992-)