2.7/4.3 Micron CO2 Branching Ratio Measurement

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...

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Bibliographic Details
Main Author: Miller, Steven M.
Other Authors: AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
Format: Text
Language:English
Published: 1989
Subjects:
Atmospheric Physics
Physical Chemistry
Radiation and Nuclear Chemistry
*UPPER ATMOSPHERE
*EMISSION SPECTRA
*CARBON DIOXIDE
FLUORESCENCE
LASER INDUCED FLUORESCENCE
MOLECULAR VIBRATION
MOLECULAR STATES
HIGH TEMPERATURE
EXCITATION
INTERFEROMETRY
RESONANCE
ENERGY LEVELS
BAND SPECTRA
INFRARED SPECTRA
COMPUTATIONS
ICE CAPS
MEASUREMENT
RATIOS
BRANCHING RATIOS
RADIATIVE BRANCHING
PE61102F
WUAFGL2310G419
Ice cap
Online Access:http://www.dtic.mil/docs/citations/ADA215952
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA215952
Description
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. Keywords: Interferometry; Resonant fluorescence; Emission spectra. (AW)

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