Measurements of Infrared Spectral Emissivities of Hot Carbon Dioxide in the 4.3-μ Region*

Richard H. Tourin

doi:10.1364/JOSA.51.000175

Journal of the Optical Society of America
Vol. 51,
Issue 2,
pp. 175-183
(1961)
•https://doi.org/10.1364/JOSA.51.000175

Measurements of Infrared Spectral Emissivities of Hot Carbon Dioxide in the 4.3-μ Region

Richard H. Tourin

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Richard H. Tourin, "Measurements of Infrared Spectral Emissivities of Hot Carbon Dioxide in the 4.3-μ Region*," J. Opt. Soc. Am. 51, 175-183 (1961)

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Abstract

Infrared spectral emissivities of hot carbon dioxide have been determined by measurement of the infrared absorption spectra of gas samples heated under controlled conditions. Measurements in the 4.3-μ region are described and are discussed in relation to molecular energy distributions, theoretically calculated emissivities, and flame radiation.

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T°K	λ(μ)	p(atm)	ps(cm atm)	p_t(atm)	∫edλ	∫eJdλ watt/cm²	${\bar{J}}_{λ}$ ∫edλ watt/cm²	% Diff.
(A) Integrated over the full spectral range of appreciable absorption

305	4.165–4.490	0.07	0.8	0.07	0.0973	0.43×10⁻⁴	0.46×10⁻⁴	+7.0
305	4.165–4.490	0.07	0.8	0.92	0.1682	0.76×10⁻⁴	0.80×10⁻⁴	+5.3
305	4.100–4.515	0.92	11.7	0.92	0.2677	0.12×10⁻³	0.12×10⁻³	0
1273	4.155–4.650	0.07	0.8	0.07	0.1812	0.34	0.34	0
1273	4.155–4.650	0.07	0.8	0.92	0.2263	0.44	0.42	−4.5
1273	4.155–4.675	0.92	11.7	0.92	0.4247	0.79	0.78	−1.3

(B) Integrated over part of the absorption region

305	4.2–4.4	0.07	0.8	0.07	0.0899	0.40×10⁻⁴	0.42×10⁻⁴	+5.0
305	4.2–4.4	0.07	0.8	0.92	0.1522	0.68×10⁻⁴	0.71×10⁻⁴	+4.4
305	4.2–4.4	0.92	11.7	0.92	0.1926	0.88×10⁻⁴	0.89×10⁻⁴	+1.1
1273	4.2–4.5	0.07	0.8	0.07	0.1574	0.30	0.30	0
1273	4.2–4.5	0.07	0.8	0.92	0.1955	0.38	0.37	−2.6
1273	4.2–4.5	0.92	11.7	0.92	0.2876	0.55	0.55	0

Lower state	Upper state	Lower-state population

v₁v₂^lv₃	v₁v₂^lv₃	300°K	1273°K	P	ν₀

00⁰0	00⁰1	0.920	0.211	1	2349 cm⁻¹
01¹0	01¹1	0.074	0.199	1	2337
02²0	02²1	0.003	0.094	1	2324
03³0	03³1	<0.001	0.044	1	2320
04⁴0	04⁴1	<0.001	0.021	1	2304
00⁰1	00⁰2	≪0.001	0.015	2	2323
00⁰2	00⁰3	≪0.001	0.001	3	2301

T°K	λ(μ)	p(atm)	ps(cm atm)	p_t(atm)	∫edλ	∫eJdλ watt/cm²	${\bar{J}}_{λ}$ ∫edλ watt/cm²	% Diff.
(A) Integrated over the full spectral range of appreciable absorption

305	4.165–4.490	0.07	0.8	0.07	0.0973	0.43×10⁻⁴	0.46×10⁻⁴	+7.0
305	4.165–4.490	0.07	0.8	0.92	0.1682	0.76×10⁻⁴	0.80×10⁻⁴	+5.3
305	4.100–4.515	0.92	11.7	0.92	0.2677	0.12×10⁻³	0.12×10⁻³	0
1273	4.155–4.650	0.07	0.8	0.07	0.1812	0.34	0.34	0
1273	4.155–4.650	0.07	0.8	0.92	0.2263	0.44	0.42	−4.5
1273	4.155–4.675	0.92	11.7	0.92	0.4247	0.79	0.78	−1.3

(B) Integrated over part of the absorption region

305	4.2–4.4	0.07	0.8	0.07	0.0899	0.40×10⁻⁴	0.42×10⁻⁴	+5.0
305	4.2–4.4	0.07	0.8	0.92	0.1522	0.68×10⁻⁴	0.71×10⁻⁴	+4.4
305	4.2–4.4	0.92	11.7	0.92	0.1926	0.88×10⁻⁴	0.89×10⁻⁴	+1.1
1273	4.2–4.5	0.07	0.8	0.07	0.1574	0.30	0.30	0
1273	4.2–4.5	0.07	0.8	0.92	0.1955	0.38	0.37	−2.6
1273	4.2–4.5	0.92	11.7	0.92	0.2876	0.55	0.55	0

Lower state	Upper state	Lower-state population

v₁v₂^lv₃	v₁v₂^lv₃	300°K	1273°K	P	ν₀

00⁰0	00⁰1	0.920	0.211	1	2349 cm⁻¹
01¹0	01¹1	0.074	0.199	1	2337
02²0	02²1	0.003	0.094	1	2324
03³0	03³1	<0.001	0.044	1	2320
04⁴0	04⁴1	<0.001	0.021	1	2304
00⁰1	00⁰2	≪0.001	0.015	2	2323
00⁰2	00⁰3	≪0.001	0.001	3	2301

Abstract

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Tables (2)

Equations (6)

Journal of the Optical Society of America