Infrared laser Stark spectrum of HNO<sub>3</sub> at 6 μm

I. Kleiner; M. Godefroid; M. Herman; A. R. W. McKellar

doi:10.1364/JOSAB.4.001159

Journal of the Optical Society of America B
Vol. 4,
Issue 7,
pp. 1159-1164
(1987)
•https://doi.org/10.1364/JOSAB.4.001159

Infrared laser Stark spectrum of HNO₃ at 6 μm

I. Kleiner, M. Godefroid, M. Herman, and A. R. W. McKellar

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I. Kleiner, M. Godefroid, M. Herman, and A. R. W. McKellar, "Infrared laser Stark spectrum of HNO₃ at 6 μm," J. Opt. Soc. Am. B 4, 1159-1164 (1987)

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Abstract

Intracavity laser Stark experiments were performed on the ν₂ fundamental band of nitric acid, HNO₃, using a CO laser. Despite the high density of observed resonances in the spectra, it was possible to recognize and fit several transitions. Calculations were made using a theoretical approach describing the Stark effect in asymmetric-topped molecules in terms of tensorial elements. The main result of the analysis was the first reported determination of the a and b components of the electric-dipole moment in the ν₂ = 1 vibrational level.

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	Nitric Acid

Laser^a	Transition	Ref. 5	Present^b
¹²C¹⁸O 15–14 P(11) 1708.1394	14_11,3–14_12,2	1708.1445(15)	1708.1444(1)
¹²C¹⁶O 16–15 P(13) 1707.8924	15_12,3–15_13,2	1707.9097(15)	1707.9095(1)
¹³C¹⁸O 13–12 P(15) 1709.0642	4_3,1–4_4,0	1709.1448(15)	1709.1442(2)
¹²C¹⁸O 14–13 P(14) 1721.2362	14_12,2–13_11,3	1721.1702(15)	1721.1726(10)

HNO₃ Line (ν_CO cm⁻¹)	Field (kV/cm)	M′–M″	TME (MHz)	Field (kV/cm)	M′–M″	TME (MHz)
14_11,3–14_12,2 (1708.1394)	1.341	13–14	−6	2.702	6–7	−1.2
	1.465	12–13	−1.2	2.796	8–7	1.8
	1.494	14–13	−1.2	3.145	5–6	−1.2
	1.586	11–12	−1.2	3.294	7–6	−0.09
	1.625	13–12	−0.2	3.795	4–5	1.2
	1.729	10–11	−1.2	4.005	6–5	2.1
	1.771	12–11	−0.9	4.705	3–4	−0.15
	1.900	9–10	−1.2	5.051	5–4	1.8
	1.953	11–10	−0.3	1.391	14–14	2.7
	2.110	8–9	−0.9	1.504	13–13	3
	2.161	10–9	−2.1	1.633	12–12	3
	2.365	7–8	−1.5	1.769	11–11	2.4
	2.448	9–8	−0.9	1.946	10–10	2.4
				2.159	9–9	0.6
15_12,3–15_13,2 (1707.8924)	2.086	14–15	−0.9	3.892	7–8	0.6
	2.226	13–14	−3	4.035	9–8	1.5
	2.286	15–14	1.8	4.428	6–7	−1.8
	2.412	12–13	1.8	4.628	8–7	1.8
	2.466	14–13	2.4	5.151	5–6	−2.1
	2.599	11–12	−2.1	5.418	7–6	1.2
	2.665	13–12	−0.6	6.161	4–5	−2.1
	2.832	10–11	−2.4	6.544	6–5	1.2
	2.912	12–11	−0.15	7.830	5–4	15
	3.082	9–10	−9	8.493	3–4	24
	3.179	11–10	−9	10.319	2–3	12
	3.444	8–9	−3	11.255	4–3	3
	3.561	10–9	−2.7	15.194	1–2	2.1
				16.993	3–2	−27
4₃₁–4₄₀ (1709.0642)	5.091	3–4	−3	7.583	4–3	15
	6.750	2–3	−3	10.095	1–2	−0.03
				11.749	3–2	−9
14_12,2–13_11,3 (1721.2362)	4.284	13–13	21	7.997	7–7	6
	4.665	12–12	6	9.330	6–6	3
	5.093	11–11	2.7	11.234	5–5	−6
	5.617	10–10	−6	13.899	4–4	27
	6.283	9–9	−27	18.659	3–3	1.8
	7.045	8–8	−18	28.037	2–2	−9

	Ground State^a	ν₂ = 1^b
μ_a	1.986	1.96(4)
μ_b	0.882	0.81(3)
μ	2.17(2)	2.12(4)

	Nitric Acid

Laser^a	Transition	Ref. 5	Present^b
¹²C¹⁸O 15–14 P(11) 1708.1394	14_11,3–14_12,2	1708.1445(15)	1708.1444(1)
¹²C¹⁶O 16–15 P(13) 1707.8924	15_12,3–15_13,2	1707.9097(15)	1707.9095(1)
¹³C¹⁸O 13–12 P(15) 1709.0642	4_3,1–4_4,0	1709.1448(15)	1709.1442(2)
¹²C¹⁸O 14–13 P(14) 1721.2362	14_12,2–13_11,3	1721.1702(15)	1721.1726(10)

HNO₃ Line (ν_CO cm⁻¹)	Field (kV/cm)	M′–M″	TME (MHz)	Field (kV/cm)	M′–M″	TME (MHz)
14_11,3–14_12,2 (1708.1394)	1.341	13–14	−6	2.702	6–7	−1.2
	1.465	12–13	−1.2	2.796	8–7	1.8
	1.494	14–13	−1.2	3.145	5–6	−1.2
	1.586	11–12	−1.2	3.294	7–6	−0.09
	1.625	13–12	−0.2	3.795	4–5	1.2
	1.729	10–11	−1.2	4.005	6–5	2.1
	1.771	12–11	−0.9	4.705	3–4	−0.15
	1.900	9–10	−1.2	5.051	5–4	1.8
	1.953	11–10	−0.3	1.391	14–14	2.7
	2.110	8–9	−0.9	1.504	13–13	3
	2.161	10–9	−2.1	1.633	12–12	3
	2.365	7–8	−1.5	1.769	11–11	2.4
	2.448	9–8	−0.9	1.946	10–10	2.4
				2.159	9–9	0.6
15_12,3–15_13,2 (1707.8924)	2.086	14–15	−0.9	3.892	7–8	0.6
	2.226	13–14	−3	4.035	9–8	1.5
	2.286	15–14	1.8	4.428	6–7	−1.8
	2.412	12–13	1.8	4.628	8–7	1.8
	2.466	14–13	2.4	5.151	5–6	−2.1
	2.599	11–12	−2.1	5.418	7–6	1.2
	2.665	13–12	−0.6	6.161	4–5	−2.1
	2.832	10–11	−2.4	6.544	6–5	1.2
	2.912	12–11	−0.15	7.830	5–4	15
	3.082	9–10	−9	8.493	3–4	24
	3.179	11–10	−9	10.319	2–3	12
	3.444	8–9	−3	11.255	4–3	3
	3.561	10–9	−2.7	15.194	1–2	2.1
				16.993	3–2	−27
4₃₁–4₄₀ (1709.0642)	5.091	3–4	−3	7.583	4–3	15
	6.750	2–3	−3	10.095	1–2	−0.03
				11.749	3–2	−9
14_12,2–13_11,3 (1721.2362)	4.284	13–13	21	7.997	7–7	6
	4.665	12–12	6	9.330	6–6	3
	5.093	11–11	2.7	11.234	5–5	−6
	5.617	10–10	−6	13.899	4–4	27
	6.283	9–9	−27	18.659	3–3	1.8
	7.045	8–8	−18	28.037	2–2	−9

Abstract

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Equations (4)

Journal of the Optical Society of America B