Absorption Cross Sections of O2 and CO2 Continua in the Schumann and Far-uv Regions
- 15 March 1971
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 54 (6), 2550-2556
- https://doi.org/10.1063/1.1675211
Abstract
By means of a photoelectrical technique used in conjunction with a 3‐m vacuum monochromator, the absorption cross section of the O2 continuum in the region 2350–1814 Å and the absorption cross section of CO2 in the region 2160–1718 Å have been measured. The cross section of the O2 continuum is 3.8 × 10−24 cm2 at 2350 Å; it slowly increases towards shorter wavelengths and reaches 10.7 × 10−24 cm2 at about 1980 Å, then increases very rapidly and reaches 7.1 × 10−22 cm2 at about 1814 Å. In the case of CO2, numerous discrete bands were found overlapping a weak continuum in the wavelength region below 1980 Å. The absorption cross section of the CO2 continuum is about 2 × 10−24 cm2 at 2100 Å; it gradually increases toward the shorter wavelength side, and reaches about 4 × 10−24 cm2 at 2000 Å. The continuum rises rapidly at 2000 Å and its value is 1.19 × 10−20 cm2 at 1718 Å. Origins of the continua of both O2 and CO2 are briefly discussed.Keywords
This publication has 21 references indexed in Scilit:
- High-Resolution Energy-Loss Spectrum of Molecular OxygenThe Journal of Chemical Physics, 1968
- A theoretical study of thev"= 0, 1, 2 progressions of bands and adjoining photodissociation continua of the O2Herzberg I systemProceedings of the Physical Society, 1967
- Absorption, Photoionization, and Fluorescence of CO2The Journal of Chemical Physics, 1966
- Potential energy curves for N2, NO, O2 and corresponding ionsJournal of Quantitative Spectroscopy and Radiative Transfer, 1965
- The absorption of molecular oxygen between 1850 and 2500 ÅJournal of Atmospheric and Terrestrial Physics, 1962
- Higher Ionization Potentials of Linear Triatomic Molecules. I. CO2The Journal of Chemical Physics, 1960
- Dissociation Processes in Oxygen above 1750 A.The Astrophysical Journal, 1957
- The Absorption Spectra of Methane, Carbon Dioxide, Water Vapor, and Ethylene in the Vacuum UltravioletThe Journal of Chemical Physics, 1950
- The absorption spectra of carbon dioxide and carbon oxysulphide in the vacuum ultra-violetProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1939
- THE TRANSMISSION OF LIQUID CARBON DIOXIDEJournal of the American Chemical Society, 1932