Carbon dioxide band intensities and linewidths in the 8–12-μm region

Muhammad S. Abubakar; John H. Shaw

doi:10.1364/AO.25.001196

Carbon dioxide band intensities and linewidths in the 8–12-μm region

Muhammad S. Abubakar and John H. Shaw

Applied Optics
Vol. 25,
Issue 7,
pp. 1196-1203
(1986)
•https://doi.org/10.1364/AO.25.001196

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Muhammad S. Abubakar and John H. Shaw, "Carbon dioxide band intensities and linewidths in the 8–12-μm region," Appl. Opt. 25, 1196-1203 (1986)

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History
- Original Manuscript: November 12, 1985
- Published: April 1, 1986

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Abstract

The self-broadened linewidths, the positions of the band centers, and the band intensities of twenty-one bands of CO₂ between 8 and 12 μm are reported. The spectra were obtained with a Fourier transform spectrometer and the data analyzed by whole band analysis.

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Band center (cm⁻¹)	Source^a

	Single line measurements	Total band measurements
927.2	15
961	1,5,7,8,9,10,12 13,14,15,16,19,20, 21,24,25	3,4,11,17
1060.5	23
1063.7	1,5,6,12,14,15, 20,21,24,25	3,4,11,17
1071.5	15
1239.4	26
1244	26
1259.4	26	2,18
1273.3	26

Serial no. of band	Transition	Isotope	Band center (cm⁻¹)		Difference (cm⁻¹)

			This work	AFGL
1	11101–10002	626	791.449(3)^b	791.448	0.001
2	12201–11102	626	828.256(2)	828.254	0.002
3	20001–11102	626	864.666(4)	864.665	0.001
4	02211–12201	626	898.540(5)	898.548	−0.008
5	00011–10001	636	913.426(4)	913.425	0.001
6	10011–20001	626	917.644(3)	917.647	−0.003
7	01111–11101	626	927.160(3)	927.156	0.004
8	10012–20002	626	941.695(4)	941.696	−0.001
9	00011–10001	626	960.9595(9)	960.959	0.0005
10	00011–10001	628	966.270(5)	966.269	0.001
11	00011–10002	636	1018.660(3)	1017.659	0.001
12	10011–20002	626	1043.636(1)	1043.637	−0.001
13	00011–10002	626	1063.7356(2)	1063.735	0.0006
14	10012–20003	626	1064.474(1)	1064.474	0.000
15	01111–11102	627	1068.180(6)
16	01111–11102	626	1071.542(1)	1071.542	0.000
17	00011–10002	628	1072.688(2)	1072.687	0.001
18	02211–12202	626	1074.246(6)	1074.239	0.007
19	11102–01101	628	1239.367(2)	1239.374	0.007
20	10002–00001	628	1259.427(2)	1259.426	0.001
21	10002–00001	627	1272.292(4)	1271.875	0.417

Serial no. of band	Band intensity 10⁻²² (cm⁻¹/mol cm⁻²)

	This work (294 K)		AFGL (296 K)
		(%)
1	6.93^b	6	11.23
2	0.151	7	0.201
3	0.042	5	0.0432
4	0.011	7	0.0185
5	0.077	5	0.113
6	0.0086	8	0.0122
7	0.382	5	0.4987
8	0.0123	5	0.01604
9	6.000	5	6.87
10	0.018	8	0.0273
11	0.054	10	0.067
12	0.015	10	0.01643
13	9.83	5	9.03
14	0.029	10	0.0326
15	0.0075	20
16	0.78	5	0.771
17	0.036	10	0.0407
18	0.026	10	0.0324
19	0.021	9	0.0351
20	0.31	5	0.382
21	0.018	15	0.022

Band	10⁴a^a	10⁴c^b
1	54(17)	14(1)
2 e–e	−11(2)	−2.6(8)
2 f–f	1.7(3)	5.3(4)
7 e–e	−4.1(1)
9	15.(1)
13	4.5(5)
16 e–e	−3200(500)
16 f–f	−94(5)
20	−3.2(8)

Line intensity (10⁻⁴ cm⁻¹/cm atm)

P(20)	P(22)	P(24)	P(16)	P(18)	Ref.
5.6(3)					10
5.49(27)	5.16(26)	4.75(24)	5.84(29)	5.65(28)	14
6.2(5)	5.8(2)	5.3(2)	6.3(3)	6.3(3)	19
	5.20	5.05			22
5.62					25
5.48(16)			5.87(18)		16
5.607					24
5.54(28)	5.25(26)	4.68(23)	5.89(30)	5.79(30)	This work

Band	Isotope	Intensity (10⁻⁵ cm⁻¹/atm cm T)

		Toth26 (296 K)	This work (294 K)	Burch18 (296 K)	Eggers2 (296 K)
11102–01101	628	5.53(7)	5.19(50)
10002–00001	628	79.3(15)	77.8(40)
10002–00001	627	3.77(8)	4.41(70)
10002–00001	638	0.66(5)
Band Sum		89.3(15)	87.4(50)	109(10)	93(5) ^a

Transition	Isotope	Band center (cm⁻¹)	F-factor (Toth26) [F=1 + a₁m + a₂J″(J″ +1)]²		This study F=(1 + am)²

			10⁴a1	10⁵a₂	10³a
11102–01101	628	1239
e⟷e			−1.44(165)	1.11(162)
f⟷f			−1.19(217)	−1.83(187)
10002–00001	638	1245	5.60(456)	−9.73(881)
10002–00001	628	1259	−2.85(51)	1.52(30)	−3.2(8)
10002–00001	627	1272	−9.38(151)	4.34(147)

Source ref.	F-factor parameters

	10³A	10⁵B
961-cm⁻¹ band
12	−4.4(1)
15	−2.2
19	−0.9(2)	-6
25	−1.30(15)	-2,8(6)
This work	2.9(1)
1064-cm⁻¹ band
6	−6.0(10)
12	−7.5(10)
15	−5.2	8.6
25	−0.9(20)	4.9(9)
This work	0.9(1)	0.2

Region	10²W₀	10²W₁	10⁰W₂	10³W₃
A	6.7(2)	3.3(8)	−0.08(8)	2.5(7)
B	4.4(2)	6.68(15)	−0.0186(7)	0.64(5)
C	6.49(8)	4.58(25)	−0.15(1)	2.40(1)
D	6.82(9)	3.68(29)	−0.104(17)	1.58(17)

P(16)	P(18)	P(20)	P(22)	P(24)	Ref.
		0.096(5)			10
0.106(5)	0.105(5)	0.096(5)	0.100(5)	0.094(5)	14
0.109(5)	0.107(4)	0.105(5)	0.106(4)	0.104(5)	19
			0.097(10)	0.100(10)	22
		0.0992(20)			25
		0.102(5)			24
0.100(5)	0.098(5)	0.096(5)	0.094(5)	0.092(5)	This work

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