Relaxation of Vibrational Energy in CO, HCl, CO<sub>2</sub>, and N<sub>2</sub>O

M. Margottin-Maclou; L. Doyennette; L. Henry

doi:10.1364/AO.10.001768

Applied Optics
Vol. 10,
Issue 8,
pp. 1768-1780
(1971)
•https://doi.org/10.1364/AO.10.001768

Relaxation of Vibrational Energy in CO, HCl, CO₂, and N₂O

M. Margottin-Maclou, L. Doyennette, and L. Henry

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M. Margottin-Maclou, L. Doyennette, and L. Henry, "Relaxation of Vibrational Energy in CO, HCl, CO₂, and N₂O," Appl. Opt. 10, 1768-1780 (1971)

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Abstract

Relaxation measurements on CO and HCl excited into the first vibrational state and on CO₂ and N₂O excited into the (00°1) vibrational state have been performed by using a fluorescence method. The rate constants associated with the de-excitation by molecular collisions have been determined at room temperature. The diffusion and accommodation coefficients have been deduced from measurements at low gas pressures, taking into account the self-absorption of the fluorescence radiation.

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d (mm)	P (Torr)	10	25	50	75	100	150	200	250	300	350	400	450
16.75	π_P	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98
	δ	131.83	52.73	26.37	17.58	13.18	8.79	6.59	5.27	4.39	3.77	3.30	2.93
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	135.82	56.74	30.42	21.66	17.29	12.97	10.83	9.58	8.76	8.21	7.81	7.50
22.40	π_P	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45
	δ	73.13	29.25	14.63	9.75	7.31	4.87	3.66	2.93	2.44	2.09	1.83	1.63
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	76.59	32.73	18.15	13.30	10.89	8.52	7.37	6.71	6.28	6.00	5.81	5.67
34.70	π_P	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77
	δ	30.70	12.28	6.14	4.09	3.07	2.05	1.54	1.23	1.02	0.88	0.77	0.68
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	33.48	15.08	8.98	6.96	5.97	5.02	4.57	4.33	4.18	4.17	4.07	4.04
52.50	π_P	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25
	δ	13.43	5.37	2.69	1.79	1.34	0.89	0.67	0.54	0.45	0.38	0.34	0.30
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	15.69	7.65	5.01	4.14	3.72	3.34	3.18	3.12	3.09	3.09	3.12	3.14

Pressure (Torr)	Cell ϕ = 10.6 mm			Cell ϕ = 14.6 mm			Cell ϕ = 16.5 mm			Cell ϕ = 30 mm

	π_P	K	δ	π_P	K	δ	π_P	K	δ	π_P	K	δ
0.050	267	37	8046	254	37	5559	248	37	4365	210	37	1943
0.100	233	75	6492	212	75	3913	203	75	2674	157	75	1178
0.150	202	112	4936	172	112	2936	162	112	2186	126	112	852
0.200	179	149	4172	149	149	2392	138	149	1753	103	149	698
0.350	138	261	2826	112	261	1637	103	261	1161	71	261	458
0.500	115	373	2162	92	373	1225	84	373	878	53	373	334
0.750	91	559	1480	69	559	860	62	559	590	38	559	210
1.000	74	745	1116	56	745	609	51	745	414	30	745	180
2.000	48	1490	552	39	1490	261	35	1490	165	22	1490	118
3.000	41	2235	334	33	2235	222	30	2235	105	19	2235	46

d (mm)	P (Torr)	10	25	50	75	100	150	200	250	300	350	400	450
16.75	π_P	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98	3.98
	δ	131.83	52.73	26.37	17.58	13.18	8.79	6.59	5.27	4.39	3.77	3.30	2.93
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	135.82	56.74	30.42	21.66	17.29	12.97	10.83	9.58	8.76	8.21	7.81	7.50
22.40	π_P	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45	3.45
	δ	73.13	29.25	14.63	9.75	7.31	4.87	3.66	2.93	2.44	2.09	1.83	1.63
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	76.59	32.73	18.15	13.30	10.89	8.52	7.37	6.71	6.28	6.00	5.81	5.67
34.70	π_P	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77	2.77
	δ	30.70	12.28	6.14	4.09	3.07	2.05	1.54	1.23	1.02	0.88	0.77	0.68
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	33.48	15.08	8.98	6.96	5.97	5.02	4.57	4.33	4.18	4.17	4.07	4.04
52.50	π_P	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25
	δ	13.43	5.37	2.69	1.79	1.34	0.89	0.67	0.54	0.45	0.38	0.34	0.30
	K	0.01	0.03	0.07	0.10	0.13	0.20	0.26	0.33	0.39	0.46	0.53	0.59
	β	15.69	7.65	5.01	4.14	3.72	3.34	3.18	3.12	3.09	3.09	3.12	3.14

Pressure (Torr)	Cell ϕ = 10.6 mm			Cell ϕ = 14.6 mm			Cell ϕ = 16.5 mm			Cell ϕ = 30 mm

	π_P	K	δ	π_P	K	δ	π_P	K	δ	π_P	K	δ
0.050	267	37	8046	254	37	5559	248	37	4365	210	37	1943
0.100	233	75	6492	212	75	3913	203	75	2674	157	75	1178
0.150	202	112	4936	172	112	2936	162	112	2186	126	112	852
0.200	179	149	4172	149	149	2392	138	149	1753	103	149	698
0.350	138	261	2826	112	261	1637	103	261	1161	71	261	458
0.500	115	373	2162	92	373	1225	84	373	878	53	373	334
0.750	91	559	1480	69	559	860	62	559	590	38	559	210
1.000	74	745	1116	56	745	609	51	745	414	30	745	180
2.000	48	1490	552	39	1490	261	35	1490	165	22	1490	118
3.000	41	2235	334	33	2235	222	30	2235	105	19	2235	46

Abstract

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Figures (13)

Tables (2)

Equations (30)

Applied Optics