Abstract

Spectral-emissivity measurements of the 15-μ band of CO₂ were made in the temperature range from 1000° to 2300°K. The hot gas was produced in a supersonic burner, which used gaseous carbon monoxide and oxygen as propellants. Many “hot” transitions were observed which were identified through their Q-branches even when the spectral resolution of the spectrometer was not very high. The total intensity of the ν₂-fundamental band system was determined at the highest temperatures and a value of 240 ± 15% cm⁻¹/cm at STP was obtained in the present experiment which is in agreement with other measurements at room temperature. The maximum error resulting from the presence of the strong central Q-branch (at 670 cm⁻¹) at a temperature of 2300°K was estimated, utilizing detailed line calculations for the fundamental transition and band-model calculations for the higher-order transitions.

© 1966 Optical Society of America

Spectral-Emissivity Measurements of the 4.3-μ CO₂ Band between 2650° and 3000°K*

C. C. Ferriso, C. B. Ludwig, and L. Acton
J. Opt. Soc. Am. 56(2) 171-173 (1966)

Spectral Emissivities and Integrated Intensities of the 2.7- μ CO₂ Band between 1200° and 1800°K*

C. C. Ferriso and C. B. Ludwig
J. Opt. Soc. Am. 54(5) 657-662 (1964)

High-Temperature Spectral Emissivities of H₂O–CO₂ Mixtures in the 2.7-μ Region

C. C. Ferriso and C. B. Ludwig
Appl. Opt. 3(12) 1435-1443 (1964)

Spectral Emissivity Calculations by the Statistical Model Applied to the 4.3-μ Bands of CO₂ at High Temperatures

Y. Ben-Aryeh
Appl. Opt. 6(6) 1049-1055 (1967)

Spectral Emissivity of the 3.3-μ Band of Methane at Elevated Temperatures

A. Goldman, E. Finkman, and U. P. Oppenheim
J. Opt. Soc. Am. 59(9) 1218-1224 (1969)