Table 5.
Changes of molecular parameters for the v28 = 1 vibrational states of g-n-PrCN obtained from our latest fit using Watson’s S reduction compared to the fit of Müller et al. (2016).
| Parameters | v28 = 1 | v28 = 1 |
|---|---|---|
| (MHz) | ΔX, (Müller et al. 2016) | ΔX, this work |
| A | −36.9279(135) | −36.9252(53) |
| B | 2.25206(85) | 2.25460(27) |
| C | −0.17562(44) | −0.17628(15) |
| DK × 103 | −2.2a | −1.96(3) |
| DJK × 103 | 0.3359(23) | 0.3344(6) |
| DJ × 106 | 8.94(57) | 9.37(4) |
| d1 × 106 | −5.61(49) | −6.17(3) |
| d2 × 106 | −1.19(27) | −0.78(19) |
| HK × 106 | 0.758(46) | |
| h1 × 1012 | 23.15(161) | |
| h2 × 1012 | 30.38(226) | |
| h3 × 1012 | 13.75(83) | |
| WRMS | 0.73 | 1.05 |
| Highest frequency | 126624 | 499388 |
| Max J″ | 21 | 89 |
| Max K″a | 18 | 20 |
| Transitions | 283 | 1186 |
Notes. The molecular parameters of v28 = 1 are expressed as Xv = 1 = Xv = 0 + ΔX. Numbers in parantheses represent the uncertainty compared to the last quoted digit. The hyperfine structure parameters used were from Vormann & Dreizler (1988). Other ground-state parameters used in Müller et al. (2016) were from Belloche et al. (2009). The parameters determined in this work are based on the up-dated ground-state parameters.
The value of ΔDK in Müller et al. (2016) was estimated with fairly secure assignments of the measured b-type transitions.
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