Infrared heterodyne spectroscopy of CO2 on Mars

Details Infrared heterodyne spectroscopy of CO2 on Mars Infrared heterodyne spectroscopy of CO2 on Mars

Jul 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.250..128p&link_type=abstract

Nature, Volume 250, Issue 5462, pp. 128-130 (1974).

Astronomy and Astrophysics

Astronomy

13

Scientific paper

THERE has been considerable interest in applying infrared heterodyne techniques to astronomical problems1-3. We have used an infrared heterodyne spectrometer operating near 11 µm with a resolving power of 1.5 × 106 to obtain spectral line profiles of carbon dioxide absorption in the Martian atmosphere. The multichannel system determined shapes of three lines in the 10° 0-00° 1 vibration-rotation band of 13C16O2, and found equivalent widths about 50 MHz (0.0017 cm-1). A lower limit of 670 MHz (0.022 cm-1) on the equivalent width of the P(20) line of 12C16O2 was also obtained.

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