Table 3
Selected atoms and molecules in the mid-IR spectral region.
| Treatment | λ (μm) | #Levelsa | #Lines | Reference | |
|---|---|---|---|---|---|
| H2O | non-LTE | 2.3 − 600 | 824 | 8190 | (1),(2),(4) |
| OH rot. | non-LTE | 25 − 120 | 20 | 50 | (3),(8) |
| OH ro-vib. | HITRAN | 10 − 50 | 2528 | 1264 | (4) |
| CO2 | HITRAN | 13 − 17 | 252 | 126 | (4) |
| HCN | HITRAN | 12 − 17 | 252 | 126 | (4) |
| C2H2 | HITRAN | 11 − 16 | 1992 | 996 | (4) |
| NH3 ro-vib. | HITRAN | 9 − 50 | 5932 | 2966 | (4) |
| CH4 | HITRAN | 18 − 25 | 430 | 215 | (4) |
| NO | HITRAN | 28 − 50 | 372 | 186 | (4) |
| H2CO | HITRAN | 19 − 50 | 3134 | 1567 | (4) |
| CH3OH | HITRAN | 9 − 11 | 28570 | 14285 | (4) |
| SO2 | HITRAN | 7 − 10 | 41590 | 20795 | (4) |
| H2S | HITRAN | 6 − 10 | 1102 | 551 | (4) |
| H2 | non-LTE | 0.3 − 29 | 160 | 1539 | (6),(7) |
| Ne+ | non-LTE | 0.4 − 12.81 | 3 | 3 | (5) |
| Ne++ | non-LTE | 0.18 − 15.55 | 5 | 9 | (3) |
| Ar+ | non-LTE | 6.985 | 2 | 1 | (3) |
| Ar++ | non-LTE | 0.3 − 8.985 | 5 | 9 | (3) |
| Fe+ | non-LTE | 0.2 − 25.99 | 120 | 956 | (5) |
| Si+ | non-LTE | 0.1 − 34.81 | 15 | 35 | (5) |
| S | non-LTE | 1.7 − 25.25 | 3 | 3 | (3) |
| S+ | non-LTE | 0.4 − 31.45 | 5 | 9 | (5) |
| S++ | non-LTE | 0.3 − 33.46 | 5 | 9 | (3) |
Notes. (a) For HITRAN molecules, the number of levels is by construction equal to 2× the number of lines. Usually, all available levels and lines are included from the various databases, within the listed wavelength intervals. However, there are a few exceptions as follows: OH ro-vib: levels with Eu = 900 − 30 000 K only; CO2: only band 01101 → 00001 and Eu < 5000 K; HCN: only band 0110 → 0000 and Eu < 5000 K; NH3: only band 0100 → 0000 with Eu = 550 − 10 000 K; C2 H2, CH4, SO2, H2 S: levels with Eu < 5000 K only; NO, H2CO, CH3 OH: levels with Eu < 10 000 K only.
References. (1) Faure & Josselin (2008); (2) Daniel et al. (2011); (3) LAMDA database (Schöier et al. 2005); (4) HITRAN 2009 database (Rothman et al. 1998, 2013); (5) CHIANTI database (Dere et al. 1997); (6) Wrathmall et al. (2007); (7) Lique (2015); (8) Offer et al. (1994).
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