Premium
Temperature dependence of the infrared absorption cross sections of carbon tetrachloride
Author(s) -
Orlando John J.,
Tyndall Geoffrey S.,
Huang Alvin,
Calvert Jack G.
Publication year - 1992
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 - 10.1029/91gl01036
Subject(s) - carbon tetrachloride , absorption (acoustics) , infrared , infrared spectroscopy , analytical chemistry (journal) , absorption spectroscopy , fourier transform infrared spectroscopy , spectral resolution , resolution (logic) , materials science , spectroscopy , fourier transform spectroscopy , absorption band , spectral line , torr , nuclear magnetic resonance , chemistry , optics , physics , organic chemistry , chromatography , quantum mechanics , astronomy , artificial intelligence , computer science , composite material , thermodynamics
Infrared absorption cross sections for carbon tetrachloride are reported over the range 730 to 825 cm −1 at four different temperatures (298, 273, 248, and 223 K). The absorption cross sections were measured using Fourier transform spectroscopy at a spectral resolution of 0.05 cm −1 . The integrated band intensity for this spectral region was found to be (5.75±0.30) × 10 −17 cm 2 molecule −1 cm −1 , independent of temperature. The absorption cross sections were found to be essentially independent of spectral resolution (between 0.05 and 0.25 cm −1 ) and foreign gas pressure (0–1 atm at 298 K, 0–200 torr at 223 K), although changes of about 5 to 10 % were noted in the structured regions of the spectrum. Our measured band intensity appears to be about 15 % higher than recently published data. These differences are discussed in terms of their effect on previously reported stratospheric CCl 4 altitude profiles.