Table 9.
Changes of molecular parameters for the v18 = v30 = 1 vibrational states of a-n-PrCN obtained from our latest fit using Watson’s S reduction.
| Parameters | v30 = 1 | v18 = 1 | v18 = v30 = 1 |
|---|---|---|---|
| (MHz) | ΔX | ΔX | ΔΔX |
| A | −810.902 | 740.532 | −196.258(60) |
| B | 1.45206 | 5.15775 | −0.42142(7) |
| C | 5.00591 | 1.97789 | 0.09133(9) |
| DK × 103 | −347.2 | 334.05 | −304.5(44) |
| DJK × 103 | 0.4936 | −0.3497 | −0.3470(9) |
| DJ × 106 | 8.115 | −2.251 | 0.4526(134) |
| d1 × 106 | 1.5523 | −1.084 | 0.3759(33) |
| d2 × 106 | 2.6451 | −2.152 | 1.5351(62) |
| HKJ × 109 | 50.1 | −59.5 | |
| HJK × 109 | −1.03 | 1.26 | |
| HJ × 109 | 0.0169 | −0.0149 | −0.00851(65) |
| h1 × 1012 | −6.5 | ||
| h2 × 1012 | −8.916 | 7.45 | |
| h3 × 1012 | −6.812 | 5.746 | −3.00(39) |
| LKKJ × 1012 | −232.1 | ||
| WRMS | 1.12 | ||
| Highest frequency | 492190 | ||
| Max J″ | 113 | ||
| Max K″a | 10 | ||
| Transitions | 613 | ||
Notes. The molecular parameters are expressed as Xv18 = v30 = 1 = Xv = 0 + ΔXv30 = 1 + ΔXv18 = 1 + ΔΔX. Numbers in parantheses represent the uncertainty compared to the last quoted digit. Parameters without uncertainties were kept fixed in the fit. The hyperfine structure parameters used were from Vormann & Dreizler (1988). The parameters determined in this work are based on the up-dated ground-state parameters and the changes for v30 = 1 and v18 = 1 already determined in this work.
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