R. Le Doucen, C. Cousin, C. Boulet, and A. Henry, "Temperature dependence of the absorption in the region beyond the 4.3-μm band head of CO2. 1: Pure CO2 case," Appl. Opt. 24, 897-906 (1985)
The temperature dependence of the high frequency far wings of the self-broadened CO2 lines has been investigated in the 2400–2600-cm−1 spectral region. The temperature dependence of the corrective shape factor χ(σ,T) is demonstrated for the first time.
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Observed Normalized Absorption Coefficient A0(σ,T) In cm−1 amagat−2 at Selected Temperatures
TK
296
296
258
238
218
193
σcm−1
PARIS
RENNES
2381.19
1.07
1.05
2382.955
0.576
0.575
2384.6105
0.308
0.310
2395
178 10−4
194 10−4
206 10−4
221 10−4
247 10−4
2397.5
141
156
166
178
201
2400
112
127
136
147
167
2402.5
91.1
104
112
124
142
2405
74.6
87.0
94.7
105
122
2407.5
62.7
74.0
81.1
90.0
105
2410
50.5 10−4
53.9
62.7
69.2
77.5
90.5
2412.5
46.2
53.9
59.2
66.3
77.5
2415
39.6
45.6
50.9
56.2
68.1
2417.5
33.7
39.1
43.6
48.1
56.2
2420
276 10−5
286.10−5
335 10−5
375 10−5
411 10−5
471 10−5
2422.5
243
285
317
349
395
2425
207
244
269
2%
333
2427.5
176
207
227
250
284
2430
155
148
175
191
211
239
2432.5
125
148
161
178
201
2435
108
125
137
150
169
2437.5
91.7
107
116
127
141
2440
78.2
79.3
91.1
98.8
107
116
2442.5
68.6
79.3
84.0
90.0
97.1
2445
60.4
68.1
72.2
76.3
81.1
2447.5
52.7
59.2
62.1
65.1
68.1
2450
46.8
50.3
52.7
54.8
58.2
2452.5
407 10−6
438 10−6
454 10−6
469 10−6
491 10−6
2455
359
381
395
408
425
2457.5
315
336
348
360
373
2460
277
297
308
317
329
2465
217 10−6
241 10−6
250 10−6
260 10−6
2470
171
192
195
200
2475
138
153
155
153
2480
115
124
123
118
2485
94.7
101
98.8
91.7
2490
76.9
80.7
78.7
72.8
2495
63.4
63.8
61.4
57.6
2500
52.3
51.2
49.7
46.9
2505
439 10−7
426 10−7
412 10−7
387 10−7
2510
373
361
348
328
2515
320
309
297
281
2520
273
265
256
243
2525
234
226
220
211
2530
200
193
188
180
2535
173
166
161
155
2540
149
143
138
131
2545
130
123
118
111
2550
113
105
101
93.5
2555
99.4
90.5
85.2
77.5
2560
88.2
77.5
72.2
63.3
2565
78.1
66.3
60.4
51.5
2570
69.8
56.8
50.3
41.4
2575
63.3
49. 1
42.6
33.1
2580
57.4
42.6
36.1
26.6
2585
52.7
37.9
30.8
21.3
Table II
Observed and Calculated Streigths S11(296 K) [cm−2 atm−1 in Natural Abundance] for Some Lines In the ν3 Band of 12C16O2
R(J)
(a)
(b)
(c)
(d)
(e)
P(J)
(a)
(d)
(e)
40
15.9
15.5
15.5
42
12.8
12.4
12.6
12.55
50
3.71
3.79
3.65
3.58
3.61
54
1.71
1.62
1.64
56
1.23
1.32
1.21
1.20
1.19
58
0.826
0.769
0.750
0.783
0.795
0.781
0.754
0.745
62
0.353
0.351
0.329
0.337
0.338
66
0.134
0.124
0.125
70
0.0533
0.0571
0.0483
0.0513
0.0503
74
0.0189
0.0184
0.0184
0.0176
0.0175
76
0.0109
0.00944
0.0101
0.0103
0.0102
78
0.00624
0.00620
0.00633
0.00593
0.00585
Geisa data bank, Ref. 8.
Measurements of Fridovich et al. using a grating spectrometer, Ref. 9.
Recent measurements of M. Devi et al. using a diode laser spectrometer, Ref. 10. Ref. 11 and present test measurements.
Calculated values of Ref. 13. The square of the matrix element of a rovibrational transition is written as |Rν3|2 Fν3(m) = 0.1086 + 1.905 10−5 m − 1.39 10−6 m2.
Table III
CO2-Broadened Linewidths (10−3 cm−1 atm−1) and Temperature Coefficient n
Optimized Parameters for the χB Factor Derived from the Birnbaum Model [see Eq. (5)]; Uncertainties are One Standard Deviation
218 K
296 K
A
0.68 ± 0.02
0.463 ± 0.007
Δ2 (cm−1)
26.8 ± 0.6
25.7 ± 0.3
Table V
Optimized χ Form Factors
296 K
χ = 1
218 K
χ = 1
χ = − 0.0564 |σ − σfi| + 1.169
Tables (5)
Table I
Observed Normalized Absorption Coefficient A0(σ,T) In cm−1 amagat−2 at Selected Temperatures
TK
296
296
258
238
218
193
σcm−1
PARIS
RENNES
2381.19
1.07
1.05
2382.955
0.576
0.575
2384.6105
0.308
0.310
2395
178 10−4
194 10−4
206 10−4
221 10−4
247 10−4
2397.5
141
156
166
178
201
2400
112
127
136
147
167
2402.5
91.1
104
112
124
142
2405
74.6
87.0
94.7
105
122
2407.5
62.7
74.0
81.1
90.0
105
2410
50.5 10−4
53.9
62.7
69.2
77.5
90.5
2412.5
46.2
53.9
59.2
66.3
77.5
2415
39.6
45.6
50.9
56.2
68.1
2417.5
33.7
39.1
43.6
48.1
56.2
2420
276 10−5
286.10−5
335 10−5
375 10−5
411 10−5
471 10−5
2422.5
243
285
317
349
395
2425
207
244
269
2%
333
2427.5
176
207
227
250
284
2430
155
148
175
191
211
239
2432.5
125
148
161
178
201
2435
108
125
137
150
169
2437.5
91.7
107
116
127
141
2440
78.2
79.3
91.1
98.8
107
116
2442.5
68.6
79.3
84.0
90.0
97.1
2445
60.4
68.1
72.2
76.3
81.1
2447.5
52.7
59.2
62.1
65.1
68.1
2450
46.8
50.3
52.7
54.8
58.2
2452.5
407 10−6
438 10−6
454 10−6
469 10−6
491 10−6
2455
359
381
395
408
425
2457.5
315
336
348
360
373
2460
277
297
308
317
329
2465
217 10−6
241 10−6
250 10−6
260 10−6
2470
171
192
195
200
2475
138
153
155
153
2480
115
124
123
118
2485
94.7
101
98.8
91.7
2490
76.9
80.7
78.7
72.8
2495
63.4
63.8
61.4
57.6
2500
52.3
51.2
49.7
46.9
2505
439 10−7
426 10−7
412 10−7
387 10−7
2510
373
361
348
328
2515
320
309
297
281
2520
273
265
256
243
2525
234
226
220
211
2530
200
193
188
180
2535
173
166
161
155
2540
149
143
138
131
2545
130
123
118
111
2550
113
105
101
93.5
2555
99.4
90.5
85.2
77.5
2560
88.2
77.5
72.2
63.3
2565
78.1
66.3
60.4
51.5
2570
69.8
56.8
50.3
41.4
2575
63.3
49. 1
42.6
33.1
2580
57.4
42.6
36.1
26.6
2585
52.7
37.9
30.8
21.3
Table II
Observed and Calculated Streigths S11(296 K) [cm−2 atm−1 in Natural Abundance] for Some Lines In the ν3 Band of 12C16O2
R(J)
(a)
(b)
(c)
(d)
(e)
P(J)
(a)
(d)
(e)
40
15.9
15.5
15.5
42
12.8
12.4
12.6
12.55
50
3.71
3.79
3.65
3.58
3.61
54
1.71
1.62
1.64
56
1.23
1.32
1.21
1.20
1.19
58
0.826
0.769
0.750
0.783
0.795
0.781
0.754
0.745
62
0.353
0.351
0.329
0.337
0.338
66
0.134
0.124
0.125
70
0.0533
0.0571
0.0483
0.0513
0.0503
74
0.0189
0.0184
0.0184
0.0176
0.0175
76
0.0109
0.00944
0.0101
0.0103
0.0102
78
0.00624
0.00620
0.00633
0.00593
0.00585
Geisa data bank, Ref. 8.
Measurements of Fridovich et al. using a grating spectrometer, Ref. 9.
Recent measurements of M. Devi et al. using a diode laser spectrometer, Ref. 10. Ref. 11 and present test measurements.
Calculated values of Ref. 13. The square of the matrix element of a rovibrational transition is written as |Rν3|2 Fν3(m) = 0.1086 + 1.905 10−5 m − 1.39 10−6 m2.
Table III
CO2-Broadened Linewidths (10−3 cm−1 atm−1) and Temperature Coefficient n
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