2.7/4.3 Micron CO2 Branching Ratio Measurement

Abstract

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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Document Details

Document Type
Technical Report
Publication Date
Jan 23, 1989
Accession Number
ADA215952

Entities

People

  • Steven M. Miller

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Absorption Cross Sections
  • Bandpass Filters
  • Coefficients
  • Crystal Structure
  • Detectors
  • Dual Mode
  • Energy Levels
  • Energy Transfer
  • Gas Cells
  • Intensity
  • Interferometers
  • Laser Beams
  • Lasers
  • Measurement
  • Radiation
  • Spectra

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Materials Science and Engineering.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers