Tunable diode laser measurements of CH sub 3 OOH absorption cross-sections near 1320 cm sup minus 1
- Bergische Universitaet-GH Wuppertal (West Germany)
Infrared absorption spectra and absorption cross-sections in the C-H deformation band of Ch{sub 3}OOH near 1,320 cm{sup {minus}1} have been measured with a tunable diode laser spectrometer. Methylhydroperoxide concentrations in a slowly flowing gas mixture were determined by UV absorption. Peak absorption cross-sections of the strongest lines observed were found to lie in the range (0.5-1.5) {times} 10{sup {minus}18} cm{sup 2} under near Doppler-limited conditions. The dependence of the peak absorption cross-sections on total air pressure in the range 2.5-90 torr was also investigated, and the possibility of CH{sub 3}OOH atmospheric mixing ratio measurement with a tunable diode laser assessed.
- OSTI ID:
- 5548958
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 16:12; ISSN GPRLA; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
CHEMISTRY
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
LASER SPECTROSCOPY
MIXING
MONITORING
OXYGEN COMPOUNDS
PEROXIDES
POLLUTION
PRESSURE DEPENDENCE
QUANTITY RATIO
RADIATIONS
SPECTROSCOPY
ULTRAVIOLET RADIATION