High-resolution absorption cross section measurements of carbon monoxide at 20 K between 96.7 and 98.8 nanometers

Details High-resolution absorption cross section measurements of carbon monoxide at 20 K between 96.7 and 98.8 nanometers High-resolution absorption cross section measurements of carbon monoxide at 20 K between 96.7 and 98.8 nanometers

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...410..837s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 2, p. 837-842.

Astronomy and Astrophysics

Astrophysics

18

Absorption Cross Sections, Carbon Monoxide, Photoabsorption, Oscillator Strengths, Supersonic Jet Flow, Synchrotron Radiation

Scientific paper

Photoabsorption cross sections for five CO bands, at wavelengths between 96.7 and 98.8 nm, have been measured at high-resolution in a supersonic jet-cooled source at the Photon Factory synchrotron facility. New integrated cross sections are reported for the K-X, L(prime)-X, and L-X bands. Low-temperature spectra of the J-X and W-X bands, which were used in the determination of the absorbing CO column densities, are also presented. The rotational structures of the K-X, L(prime)-X, and L-X bands do not overlap in the low-temperature spectra, allowing for the first unambiguous determination of these band oscillator strengths. We also report revised room temperature measurements of integrated cross sections for the K-X, L(prime)-X, and L-X bands, in which distortions in the measured spectra due to insufficient instrumental resolution have been minimized; the revised room temperature integrated cross sections are consistent with the low-temperature results.

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