Table 2.
Molecular parameters for the ground vibrational states of n-PrCN obtained from our latest fit using Watson’s S reduction compared to the fit of Belloche et al. (2009).
| Parameters(MHz) | g-n-PrCN |
a-n-PrCN |
||
|---|---|---|---|---|
| (Belloche et al. 2009) | This work | (Belloche et al. 2009) | This work | |
| A | 10060.41649(108) | 10060.41587(11) | 23668.31931(143) | 23668.31883(44) |
| B | 3267.662408(301) | 3267.662256(28) | 2268.146892(147) | 2268.146732(27) |
| C | 2705.459572(290) | 2705.459402(24) | 2152.963946(168) | 2152.963902(27) |
| DK × 103 | 60.235(6) | 60.2384(5) | 240.653(29) | 240.571(14) |
| DJK × 103 | −18.26470(117) | −18.26546(9) | −10.82631(92) | −10.82269(21) |
| DJ × 106 | 3195.064(207) | 3194.979(15) | 398.674(69) | 398.722(8) |
| d1 × 106 | −1037.470(55) | −1037.503(5) | −46.637(42) | −46.5923(23) |
| d2 × 106 | −77.1864(183) | −77.1647(16) | −0.5901(59) | −0.5889(17) |
| HK × 106 | 1.806(18) | 1.8411(9) | 2.5a | 2.5a |
| HKJ × 109 | −517.3(35) | −518.81(18) | 372.4(24) | 422.1(8) |
| HJK × 109 | 9.92(68) | 9.804(27) | −20.67(20) | −21.600(25) |
| HJ × 109 | 4.486(56) | 4.4445(33) | 0.353(11) | 0.3743(9) |
| h1 × 109 | 2.505(29) | 2.5205(16) | 0.117(14) | 0.09830(15) |
| h2 × 1012 | 524.6(135) | 518.38(26) | 1.83(12) | |
| h3 × 1012 | 111.3(31) | 109.02(10) | ||
| LKKJ × 1012 | 30.6(31) | 32.47(20) | −72.7(8) | |
| LJK × 1012 | −4.11(78) | −4.209(18) | ||
| LJJK × 1015 | 118.40(308) | 35.55(131) | ||
| LJ × 1015 | −2.273(246) | −0.513(34) | ||
| l1 × 1015 | −2.013(134) | |||
| PKKKJ × 1015 | −0.807(60) | |||
| χaa | −1.683b | −3.440b | ||
| χbb | −0.252b | 1.385b | ||
| χcc | 1.935b | 2.055b | ||
| WRMS | 0.66 | 0.98 | 0.75 | 0.97 |
| Highest frequency | 282073 | 499969 | 283196 | 499936 |
| Max J″ | 47 | 91 | 63 | 115 |
| Max K″a | 34 | 45 | 23 | 29 |
| Transitions | 215 | 3505 | 207 | 2199 |
Notes. The fits of Belloche et al. (2009) are based on work from Demaison & Dreizler (1982), Wlodarczak et al. (1988), Vormann & Dreizler (1988). WRMS is short for weighted root mean square used to evaluate the final fit. 
, where δ(i) is the residual of each transition assigned; err(i) is the uncertainty evaluated; N is the number of transitions. Numbers in parantheses represent the uncertainty compared to the last quoted digit.
The value of HK was estimated by Belloche et al. (2009).
The new added hyperfine split lines can all be fit correctly with the hyperfine structure parameters from Vormann & Dreizler (1988), so they were fixed in this work.
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