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Table 1
Spectroscopic parameters of the 15NH2 and 14NH2 radicals in their ground vibronic state.
| Parameter in MHz | 15NH2 | 14NH2a |
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|
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| Rotational and centrifugal distortion constants | ||
|
|
||
| A | 704 388.406(45)b | 710 302.019(10) |
| B | 388 292.32(11) | 388 289.458(15) |
| C | 244 293.59(12) | 245 013.520(11) |
| ΔK | 649.370(34) | 659.7470(33) |
| ΔNK | –124.365(18) | –125.1228(16) |
| ΔN | 31.6626(24) | 31.68194(44) |
| δ K | 28.732(70) | 29.6553(65) |
| δ N | 12.7139(15) | 12.70818(17) |
| ΦK | 1.9178(28) | 1.99230(42) |
| ΦKN | –0.2739(27) | –0.28242(48) |
| ΦNK | -0.04960(89) | –0.04888(15) |
| ΦN | 0.012841(66) | 0.0128969(81) |
| φ K | 0.507(11) | 0.52551(69) |
| φ NK | –0.01624(33) | –0.016015(67) |
| φN × 10-3 | 6.409(32) | 6.4313(43) |
| LK × 10-3 | –8.63(24) | –10.665(22) |
| LKKN × 10-3 | 3.70( 37) | 3.755(16) |
| LNK × 10-3 | -1.03(15) | –0.9976((57) |
| LNNK × 10-3 | 0.0615( 37) | 0.057(14) |
| LN × 10-6 | –6.80(56) | –7.993(81) |
| lK × 10-3 | –3.63(34) | –4.145(15) |
| lKN × 10-6 | 108.4c | 108.4(38) |
| lNK × 10-6 | 8.03c | 8.03(35) |
| lN × 10-6 | –3.45(29) | –4.031(43) |
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| Fine structure constants | ||
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| ϵ aa | –9188.74(10) | –9267.840(26) |
| ϵ bb | –1353.75(14) | –1354.194(14) |
| ϵ cc | 11.89(13) | 12.220(15) |
|
33.110(76) | 34.0205(72) |
 +  |
–3.200(45) | –3.4938(67) |
|
|
15.7(22) | 0.950(85) |
|
0.3067(46) | 0.31386(48) |
|
0.451(45) | 0.5667(51) |
|
0.1474(24) | 0.15716(24) |
|
–0.1817(35) | –0.19276(70) |
|
0.0225(26) | 0.02695(67) |
|
–0.01032c | –0.01032(69) |
|
0.920c | 0.920(13) |
|
–0.144c | –0.144(11) |
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| Hyperfine structure constants | ||
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| aF(N) | –39.275(69) | 28.066(10) |
| Taa(N) | 60.34(15) | –43.175(16) |
| Tbb(N) | 62.19(11) | –44.453(18) |
| Caa(N) | –0.661(75) | 0.4618(64) |
| Cbb(N) | –0.161(32) | 0.0941(52) |
| Ccc(N) | –0.01501d | 0.0107(37) |
| aF(H) | –67.187(34) | –67.184(11) |
| Taa(H) | 18.577(76) | 18.333(20) |
| Tbb(H) | –13.248(62) | –13.161(22) |
| Tab(H) | 58.50e | 58.50e |
| Caa(H) | 0.2183c | 0.2183(78) |
| Cbb(H) × 10-3 | –6.8d | –6.8(65) |
| Ccc(H) | –0.0248d | –0.0248(50) |
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| Number of FT-FIR lines (62–227 cm-1) | 142 | |
| Standard deviation of the FT-FIR data (in cm-1) | 1.0 × 10-4 | |
| Number of submillimeter lines (150–660 GHz) | 77 | |
| Standard deviation of the submillimeter data (in kHz) | 115.5 | |
|
13, 5 | |
| Weighted deviation of fit | 0.88 | |
Notes.
(a)
14NH2 parameters are from Martin-Drumel et al. (2014).
(d)
Fixed at the value from Gendriesch et al. (2001).
(e)
Fixed at the value from Steimle et al. (1980).
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