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Tunable diode laser measurements of CH 3 OOH absorption cross‐sections near 1320 CM −1
Author(s) -
Becker K. H.,
Brockmann K. J.,
Bechara J.
Publication year - 1989
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl016i012p01367
Subject(s) - tunable diode laser absorption spectroscopy , absorption (acoustics) , materials science , analytical chemistry (journal) , laser , absorption spectroscopy , spectrometer , diode , spectral line , atmospheric pressure , tunable laser , torr , optics , chemistry , optoelectronics , physics , chromatography , astronomy , meteorology , composite material , thermodynamics
Infrared absorption spectra and absorption cross‐sections in the C‐H deformation band of CH 3 OOH near 1320 cm −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) × 10 −18 cm² 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 3 OOH atmospheric mixing ratio measurement with a tunable diode laser assessed.