Predictions for collisional broadening of far-infrared OH rotational lines of atmospheric interest

Giovanni Buffa; Ottavio Tarrini; Massimo Inguscio

doi:10.1364/AO.26.003066

Applied Optics
Vol. 26,
Issue 15,
pp. 3066-3068
(1987)
•https://doi.org/10.1364/AO.26.003066

Predictions for collisional broadening of far-infrared OH rotational lines of atmospheric interest

Giovanni Buffa, Ottavio Tarrini, and Massimo Inguscio

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Giovanni Buffa, Ottavio Tarrini, and Massimo Inguscio, "Predictions for collisional broadening of far-infrared OH rotational lines of atmospheric interest," Appl. Opt. 26, 3066-3068 (1987)

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Abstract

Collisional line shapes for OH in the presence of N₂ are computed using the Anderson theory. The theoretical results compare satisfactorily with the experimental results now available. Predictions for all strong OH farinfrared lines are given together with the dependence of broadening and shift on temperature. The results will be useful in the interpretation of atmospheric or astrophysical spectra.

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Transition	Frequency (cm⁻¹)	W (Theory) (cm⁻¹/atm)	W(Experiment9) (cm⁻¹/atm)
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 7 / 2 \leftarrow 5 / 2 \\ + \leftarrow - \end{array}}$	118.4	0.098	0.087 ± 0.009
$\begin{array}{l} {{}^{2}Π}_{1 / 2} \leftarrow {{}^{2}Π}_{1 / 2} \\ J : 3 / 2 \leftarrow 1 / 2 \\ + \leftarrow - \end{array}}$	61.3	0.109	0.096 ± 0.010

Transition^a	Frequency (cm⁻¹)	T = 200K		T = 300K		T = 400K		−β
Transition^a	Frequency (cm⁻¹)	W	S	W	S	W	S	−β
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 5 / 2 \leftarrow 3 / 2 \end{array}$	84	150	4.6	112	1.8	91	1.0	0.71
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 7 / 2 \leftarrow 5 / 2 \end{array}$	118	125	3.3	98	2.0	82	1.3	0.61
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 3 / 2 \leftarrow 1 / 2 \end{array}$	61	146	4.3	109	1.8	88	0.8	0.72
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 5 / 2 \leftarrow 3 / 2 \end{array}$	101	122	6.3	97	3.0	81	1.8	0.59

Transition	Frequency (cm⁻¹)	W (Theory) (cm⁻¹/atm)	W(Experiment9) (cm⁻¹/atm)
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 7 / 2 \leftarrow 5 / 2 \\ + \leftarrow - \end{array}}$	118.4	0.098	0.087 ± 0.009
$\begin{array}{l} {{}^{2}Π}_{1 / 2} \leftarrow {{}^{2}Π}_{1 / 2} \\ J : 3 / 2 \leftarrow 1 / 2 \\ + \leftarrow - \end{array}}$	61.3	0.109	0.096 ± 0.010

Transition^a	Frequency (cm⁻¹)	T = 200K		T = 300K		T = 400K		−β
Transition^a	Frequency (cm⁻¹)	W	S	W	S	W	S	−β
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 5 / 2 \leftarrow 3 / 2 \end{array}$	84	150	4.6	112	1.8	91	1.0	0.71
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 7 / 2 \leftarrow 5 / 2 \end{array}$	118	125	3.3	98	2.0	82	1.3	0.61
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 3 / 2 \leftarrow 1 / 2 \end{array}$	61	146	4.3	109	1.8	88	0.8	0.72
$\begin{array}{l} {{}^{2}Π}_{3 / 2} \leftarrow {{}^{2}Π}_{3 / 2} \\ J : 5 / 2 \leftarrow 3 / 2 \end{array}$	101	122	6.3	97	3.0	81	1.8	0.59

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Applied Optics