| Summary: | Two rocket infrared measurement programs during the 1970 's (ICe CAP and SPIRE) measured significant amounts of radiation in the upper atmosphere at 2.7 microns. Several papers have been published which attribute this radiation at 2.7 microns to the hot bands of Carbon dioxide. To determine the contribution of 2.7 microns radiation from CO2 each of these analyses rely on a simple theoretical calculation of the CO2 branching ratio between 2.7 microns and 4.3 microns. The radiative branching from the CO2(021) combination vibrational energy state to the CO2 (020) and CO2 (000) states is measured using both laser induced fluorescence excitation and spectrally resolved fluorescence experiments. These measurements bound the branching ratio (C02(021) CO2 (020)/CO2(O21) CO2 (000)) between 13 and 16. Research supported by the Air Force Geophysics Laboratory, United States Air Force, Hanscom AFB, Massachusetts. Optical Physics Division Project 2310. ADA215952 (from http://www.dtic.mil). "23 January 1989." Includes bibliographical references (page 25). Two rocket infrared measurement programs during the 1970 's (ICe CAP and SPIRE) measured significant amounts of radiation in the upper atmosphere at 2.7 microns. Several papers have been published which attribute this radiation at 2.7 microns to the hot bands of Carbon dioxide. To determine the contribution of 2.7 microns radiation from CO2 each of these analyses rely on a simple theoretical calculation of the CO2 branching ratio between 2.7 microns and 4.3 microns. The radiative branching from the CO2(021) combination vibrational energy state to the CO2 (020) and CO2 (000) states is measured using both laser induced fluorescence excitation and spectrally resolved fluorescence experiments. These measurements bound the branching ratio (C02(021) CO2 (020)/CO2(O21) CO2 (000)) between 13 and 16. Mode of access: Internet.
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