Time and wavelength resolved spectroscopy for proton excited xenon

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6375130

Gaiser, J E

Time and wavelength resolved spectroscopic measurements have been performed for xenon gas excited by 2.0 MeV protons. Reaction rate constants for the formation and decay of the /sup 3/..sigma../sub u/ and the /sup 1/..sigma../sub u/ states in Xe/sub 2/ via three body collisions are 31 Hz/Torr/sup 2/ and 61 Hz/Torr/sup 2/, respectively. A kinetic model based on the experimental facts is presented and is examined. The lifetime of the /sup 3/..sigma../sub u/ state in Xe/sub 2/ has been measured to be 102 ns. Single photon counting techniques were used and both the 172 nm radiation from the /sup 3/..sigma../sub u/ state as well as the 152 nm radiation from the /sup 1/..sigma../sub u/ state were monitored as a function of time and pressure. The rate constants of interest have been extracted from the pressure dependence of the decay times. Ion recombination kinetic processes were clearly distinguishable at higher pressures and could be dealt with independently from the excited state channel reactions. Tests were performed to insure that events which occur late in time following excitation were actually ion recombination processes. Absolute conversion efficiencies were measured for proton energy input to 172 nm photon energy output. Photodissociation of XeF/sub 2/ to form XeF(B) and XeF(C) via the reactions XeF/sub 2/ + h nu ..-->.. XeF(B) + F; XeF/sub 2/ + h nu ..-->.. XeF(C) + F was attempted using 172 nm photons from Xe/sub 2/, however no C state emission at 480 nm or B state emission at 351 nm was observed.

• Research Organization: Auburn Univ., AL (USA)
• OSTI ID: 6375130
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
COLLISIONS
DATA
DISSOCIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INFORMATION
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
LIFETIME
MASSLESS PARTICLES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
MOLECULE COLLISIONS
NONMETALS
NUMERICAL DATA
PHOTONS
PRESSURE DEPENDENCE
RARE GAS COMPOUNDS
RARE GASES
RECOMBINATION
SPECTROSCOPY
TIME DEPENDENCE
XENON
XENON COMPOUNDS
XENON FLUORIDES