N2 Scattering Measurements at 10.6 Microns
Final rept. 11 Jul 1972-31 May 1974
AERODYNE RESEARCH INC BILLERICA MA
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An experimental facility was constructed to measure the molecular scattering cross sections of atmospheric constituents at 10.6 micrometers. The system was designed to measure the cross sections relative to the radiative lifetime of the 0.4 and 10.4 micrometer bands of CO2. The calibration procedure consisted of the measurement of CO2 fluorescence following laser saturated absorption. It provided a direct measurement of the sensitivity of the apparatus. The N2 Rayleigh cross section was measured. The N2 rotational Raman scattering level, estimated to be almost two orders of magnitude below the Rayleigh level, was too low to be measured with this facility.
- Atmospheric Physics
- Atomic and Molecular Physics and Spectroscopy