Applications of infrared laser spectroscopy to laser chemistry and laser development

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6235256

McDowell, R S

The impact on infrared molecular spectroscopy of high-resolution tunable laser sources and laser-controlled Fourier-transform spectrometers is discussed, with special reference to rovibrational spectra of spherical-top molecules such as CH/sub 4/, OsO/sub 4/, SiF/sub 4/, SF/sub 6/, and UF/sub 6/. The role of tunable laser spectroscopy in analyzing the CF/sub 4/ laser, resulting in the precise prediction of lasing frequencies between 605 and 655 cm/sup /minus/1/, is described. Studies of overtone and combination bands of SF/sub 6/ enable the vibrational anharmonicity to be determined, resulting in a more detailed description of the pump transitions involved in laser photochemistry, and of higher vibrational levels and pathways to excitation and dissociation. This permits more accurate calculations of vibrational state densities for spherical-top molecules. Implications for the photochemistry of species, such as SiF/sub 4/, SF/sub 6/, UF/sub 6/, and Ni(Co)/sub 4/, are discussed. 48 refs., 8 figs., 2 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6235256
• Report Number(s): LA-UR-89-1161; CONF-8901123-1; ON: DE89011196
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500 -- Photochemistry
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CHEMISTRY
DESIGN
ENERGY LEVELS
EXCITED STATES
FOURIER TRANSFORM SPECTROMETERS
HISTORICAL ASPECTS
LASER SPECTROSCOPY
LASERS
MEASURING INSTRUMENTS
RESOLUTION
SPECTROMETERS
SPECTROSCOPY
USES