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Table 3
Effective spectroscopic constants determined from state-by-state fits of the rotational transitions measured for the ground and v4 = 1, v5 = 1, v4 = v5 = 1 states of 12C2HDa.
| Parameter | Unit | G . S . | v4 = 1 | v5 = 1 | v4 = v5 = 1 |
|
|
|||||
| B | MHz | 29725.24646(27) | 29805.44743(32) | 29770.36999(18) | 29849.79104(50) |
| Previous value | 29725.24501(82)b | 29803.0066(43)c | 29766.7458(44)c | ||
| D | kHz | 34.0383(41) | 35.1929(21) | 34.5408(10) | 35.5450(43) |
| Previous value | 34.0186(45)b | 35.107(44)c | 34.482(54)c | ||
| H | Hz | 0.090(18) | |||
| γ 44 | MHz | –2.44328d | –2.44328d | ||
| δ 44 | kHz | –0.1003 d | |||
| γ 55 | MHz | –3.62753d | –3.62753d | ||
| δ 55 | kHz | –0.0767 d | |||
| γ 45 | MHz | 0.07645(52) | |||
| q t | MHz | 133.05208(66) | 105.69975(36) | e | |
| Previous value | 133.0259(71)c | 105.6843(65)c | |||
|
kHz | –1.1512(42) | -0.6544(21) | f | |
| Previous value | –1.205(26)c | –0.693(24)c | |||
| g 45 | GHz | 20.9453(26) | |||
| r 45 | GHz | 64.5713(27) | |||
|
MHz | –0.72846(35) | |||
| σ fit | kHz | 2.9 | 7.5 | 4.4 | 12.5 |
| No. of lines | 10 | 17 | 18 | 25 | |
| J range | 1–10 | 1–10 | 1–10 | 1–8 | |
Notes.
(b)
From Cazzoli et al. (2008).
(c)
From Wlodarczak et al. (1989).
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