Étude par transformation de Fourier de CH<sub>3</sub>Br et CH<sub>3</sub>Cl dans l’infrarouge très lointain

Jacques Pesenti; Michèle Sergent-Rozey

doi:10.1364/AO.13.001158

Applied Optics
Vol. 13,
Issue 5,
pp. 1158-1163
(1974)
•https://doi.org/10.1364/AO.13.001158

Étude par transformation de Fourier de CH₃Br et CH₃Cl dans l’infrarouge très lointain

Jacques Pesenti and Michèle Sergent-Rozey

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Jacques Pesenti and Michèle Sergent-Rozey, "Étude par transformation de Fourier de CH₃Br et CH₃Cl dans l’infrarouge très lointain," Appl. Opt. 13, 1158-1163 (1974)

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Abstract

A high resolution Fourier transform spectrometer has been constructed for working in the far infrared region. After a description of this instrument, its performance in the 10–40 cm⁻¹ spectral region is demonstrated by studying the pure rotational spectra of CH₃Cl and CH₃Br. A working resolution of 0.05 cm⁻¹ is verified, and isotopic splitting is observed in CH₃Br out to 14 cm⁻¹.

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	B₀, cm⁻¹	D_J, cm⁻¹	D_JK, cm⁻¹
CH₃Cl 35	0.4434014	0.604 10⁻⁶	6.6 10⁻⁶
CH₃Cl 37	0.4365730	0.604 10⁻⁶	6.6 10⁻⁶
CH₃Br 79	0.31916075	0.330228 10⁻⁶	4.27962 10⁻⁶
CH₃Br 81	0.31794724	0.32256 10⁻⁶	4.2496 10⁻⁶

CH₃Br					CH₃Cl

	Br 79		Br 81			Cl 35		Cl 37

J	σ_c, cm⁻¹	σ_v, cm⁻¹	σ_c, cm⁻¹	σ_v, cm⁻¹	J	σ_c, cm⁻¹	σ_v, cm⁻¹	σ_c, cm⁻¹	σ_v, cm⁻¹
22	14,664	14,659	14,608	14,608	10	9,750	9,748	9,600	9,601
23	15,300	15,295	15,242	15,239	11	10,636	10,633	10,472	10,472
24	15,935	15,932	15,875	15,871	12	11,522	11,521	11,344	11,338
25	16,571	16,568	16,509	16,503	13	12,407	12,403	12,216	12,212
26	17,207	17,204	17,142	17,140	14	13,292	13,285	13,087	13,082
27	17,842	17,837	17,774	17,766	15	14,177	14,172	13,959	13,955
28	18,477	18,473	18,407	18,402	16	15,062	15,058	14,830	14,831
29	19,112	19,104	19,040	19,032	17	15,946	15,939	15,700	15,696
30	19,746	19,741	19,672	19,664	18	16,830	16,826	16,571	16,572
31	20,381	20,376	20,304	20,298	19	17,714	17,713	17,441	17,435
32	21,015	21,008	20,935	20,927	20	18,598	18,590	18,311	18,309
33	21,648	21,644	21,567	21,562	21	19,481	19,477	19,181	19,179
34	22,282	22,273	22,198	22,187	22	20,364	20,358	20,050	20,045
35	22,915	22,909	22,829	22,821	23	21,247	21,241	20,919	20,913
36	23,548	23,541	23,460	23,450	24	22,129	22,123	21,788	21,787
37	24,181	24,169	24,090	24,082	25	23,011	23,004	22,656	22,651
38	24,813	24,803	24,720	24,713	26	23,893	23,888	23,524	23,519
39	25,445	25,434	25,350	25,341	27	24,774	24,767	24,392	24,389
40	26,077	26,068	25,979	25,968	28	25,655	25,646	25,259	25,252
41	26,708	26,699	26,608	26,600	29	26,535	26,526	26,126	26,121
42	27,339	27,330	27,237	27,228	30	27,415	27,408	26,992	26,992
43	27,970	27,960	27,866	27,856	31	28,295	28,288	27,858	27,854
44	28,601	28,594	28,494	28,486	32	29,174	29,162	28,723	28,719
45	29,231	29,222	29,122	29,112	33	30,052	30,040	29,588	29,582
46	29,860	29,851	29,749	29,739	34	30,930	30,919	30,452	30,447
47	30,490	30,487	30,376	30,364	35	31,808	31,795	31,316	31,314
48	31,119	31,116	31,003	30,999	36	32,685	32,673	32,180	32,170
49	31,747	31,741	31,629	31,617	37	33,561	33,547	33,042	33,037
50	32,375	32,365	32,255	32,244	38	34,437	34,425	33,905	33,898
51	33,003	32,991	32,881	32,875	39	35,313	35,300	34,766	34,758
52	33,630	33,625	33,506	33,494	40	36,188	36,175	35,628	35,624
53	34,257	34,249	34,130	34,122	41	37,062	37,047	36,488	36,482
54	34,884	34,874	34,755	34,744	42	37,935	37,917	37,348	37,338
55	35,510	35,498	35,379	35,372	43	38,808	38,796	38,207	38,205
56	36,135	36,128	36,002	35,996	44	39,681	39,669	39,066	39,061
57	36,760	36,752	36,625	36,614	45	40,552		39,924	39,920
58	37,385	37,378	37,247	37,248
59	38,009	38,000	37,870	37,863
60	38,633	38,622	38,491	38,481
61	39,256	39,246	39,112	39,102
62	39,879	39,867	39,733	39,729
63	40,501	40,494	40,353	40,343
64	41,123	41,123	40,973	40,962
65	41,744	41,739	41,592	41,573
66	42,365	42,363	42,211	42,198
67	42,985	42,979	42,829	42,811
68	43,605	43,605	43,446	43,446

	B₀, cm⁻¹	D_J, cm⁻¹	D_JK, cm⁻¹
CH₃Cl 35	0.4434014	0.604 10⁻⁶	6.6 10⁻⁶
CH₃Cl 37	0.4365730	0.604 10⁻⁶	6.6 10⁻⁶
CH₃Br 79	0.31916075	0.330228 10⁻⁶	4.27962 10⁻⁶
CH₃Br 81	0.31794724	0.32256 10⁻⁶	4.2496 10⁻⁶

CH₃Br					CH₃Cl

	Br 79		Br 81			Cl 35		Cl 37

J	σ_c, cm⁻¹	σ_v, cm⁻¹	σ_c, cm⁻¹	σ_v, cm⁻¹	J	σ_c, cm⁻¹	σ_v, cm⁻¹	σ_c, cm⁻¹	σ_v, cm⁻¹
22	14,664	14,659	14,608	14,608	10	9,750	9,748	9,600	9,601
23	15,300	15,295	15,242	15,239	11	10,636	10,633	10,472	10,472
24	15,935	15,932	15,875	15,871	12	11,522	11,521	11,344	11,338
25	16,571	16,568	16,509	16,503	13	12,407	12,403	12,216	12,212
26	17,207	17,204	17,142	17,140	14	13,292	13,285	13,087	13,082
27	17,842	17,837	17,774	17,766	15	14,177	14,172	13,959	13,955
28	18,477	18,473	18,407	18,402	16	15,062	15,058	14,830	14,831
29	19,112	19,104	19,040	19,032	17	15,946	15,939	15,700	15,696
30	19,746	19,741	19,672	19,664	18	16,830	16,826	16,571	16,572
31	20,381	20,376	20,304	20,298	19	17,714	17,713	17,441	17,435
32	21,015	21,008	20,935	20,927	20	18,598	18,590	18,311	18,309
33	21,648	21,644	21,567	21,562	21	19,481	19,477	19,181	19,179
34	22,282	22,273	22,198	22,187	22	20,364	20,358	20,050	20,045
35	22,915	22,909	22,829	22,821	23	21,247	21,241	20,919	20,913
36	23,548	23,541	23,460	23,450	24	22,129	22,123	21,788	21,787
37	24,181	24,169	24,090	24,082	25	23,011	23,004	22,656	22,651
38	24,813	24,803	24,720	24,713	26	23,893	23,888	23,524	23,519
39	25,445	25,434	25,350	25,341	27	24,774	24,767	24,392	24,389
40	26,077	26,068	25,979	25,968	28	25,655	25,646	25,259	25,252
41	26,708	26,699	26,608	26,600	29	26,535	26,526	26,126	26,121
42	27,339	27,330	27,237	27,228	30	27,415	27,408	26,992	26,992
43	27,970	27,960	27,866	27,856	31	28,295	28,288	27,858	27,854
44	28,601	28,594	28,494	28,486	32	29,174	29,162	28,723	28,719
45	29,231	29,222	29,122	29,112	33	30,052	30,040	29,588	29,582
46	29,860	29,851	29,749	29,739	34	30,930	30,919	30,452	30,447
47	30,490	30,487	30,376	30,364	35	31,808	31,795	31,316	31,314
48	31,119	31,116	31,003	30,999	36	32,685	32,673	32,180	32,170
49	31,747	31,741	31,629	31,617	37	33,561	33,547	33,042	33,037
50	32,375	32,365	32,255	32,244	38	34,437	34,425	33,905	33,898
51	33,003	32,991	32,881	32,875	39	35,313	35,300	34,766	34,758
52	33,630	33,625	33,506	33,494	40	36,188	36,175	35,628	35,624
53	34,257	34,249	34,130	34,122	41	37,062	37,047	36,488	36,482
54	34,884	34,874	34,755	34,744	42	37,935	37,917	37,348	37,338
55	35,510	35,498	35,379	35,372	43	38,808	38,796	38,207	38,205
56	36,135	36,128	36,002	35,996	44	39,681	39,669	39,066	39,061
57	36,760	36,752	36,625	36,614	45	40,552		39,924	39,920
58	37,385	37,378	37,247	37,248
59	38,009	38,000	37,870	37,863
60	38,633	38,622	38,491	38,481
61	39,256	39,246	39,112	39,102
62	39,879	39,867	39,733	39,729
63	40,501	40,494	40,353	40,343
64	41,123	41,123	40,973	40,962
65	41,744	41,739	41,592	41,573
66	42,365	42,363	42,211	42,198
67	42,985	42,979	42,829	42,811
68	43,605	43,605	43,446	43,446

Abstract

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Equations (8)

Applied Optics