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Table 9
Rotational energy levels (cm−1) of the X1Σ+ground state for six CO isotopologues (calculated from the Farrenq et al. 1991 Dunham coefficients).
| J′′ | 12C16O | 12C17O | 12C18O | 13C16O | 13C17O | 13C18O |
|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 3.845 | 3.748 | 3.662 | 3.676 | 3.579 | 3.493 |
| 2 | 11.535 | 11.244 | 10.986 | 11.028 | 10.736 | 10.478 |
| 3 | 23.069 | 22.487 | 21.971 | 22.055 | 21.472 | 20.956 |
| 4 | 38.448 | 37.477 | 36.617 | 36.757 | 35.786 | 34.926 |
| 5 | 57.670 | 56.214 | 54.924 | 55.134 | 53.677 | 52.388 |
| 6 | 80.735 | 78.696 | 76.891 | 77.185 | 75.145 | 73.340 |
| 7 | 107.642 | 104.924 | 102.518 | 102.909 | 100.190 | 97.783 |
| 8 | 138.390 | 134.895 | 131.802 | 132.305 | 128.809 | 125.715 |
| 9 | 172.978 | 168.610 | 164.743 | 165.372 | 161.003 | 157.136 |
| 10 | 211.404 | 206.066 | 201.341 | 202.109 | 196.770 | 192.044 |
| 11 | 253.667 | 247.262 | 241.593 | 242.515 | 236.108 | 230.438 |
| 12 | 299.766 | 292.197 | 285.498 | 286.588 | 279.017 | 272.317 |
| 13 | 349.698 | 340.869 | 333.055 | 334.326 | 325.495 | 317.679 |
| 14 | 403.461 | 393.276 | 384.261 | 385.727 | 375.540 | 366.523 |
| 15 | 461.054 | 449.416 | 439.116 | 440.791 | 429.150 | 418.847 |
| 16 | 522.475 | 509.288 | 497.616 | 499.515 | 486.324 | 474.650 |
| 17 | 587.721 | 572.888 | 559.761 | 561.896 | 547.059 | 533.928 |
| 18 | 656.789 | 640.215 | 625.546 | 627.932 | 611.354 | 596.681 |
| 19 | 729.677 | 711.266 | 694.971 | 697.622 | 679.206 | 662.906 |
| 20 | 806.383 | 786.039 | 768.033 | 770.962 | 750.612 | 732.601 |
| 21 | 886.902 | 864.530 | 844.729 | 847.950 | 825.571 | 805.763 |
| 22 | 971.233 | 946.737 | 925.056 | 928.582 | 904.079 | 882.391 |
| 23 | 1059.372 | 1032.657 | 1009.011 | 1012.857 | 986.133 | 962.480 |
| 24 | 1151.315 | 1122.285 | 1096.591 | 1100.771 | 1071.731 | 1046.028 |
| 25 | 1247.059 | 1215.620 | 1187.794 | 1192.320 | 1160.870 | 1133.034 |
| 26 | 1346.601 | 1312.658 | 1282.615 | 1287.502 | 1253.546 | 1223.492 |
| 27 | 1449.936 | 1413.395 | 1381.051 | 1386.312 | 1349.757 | 1317.401 |
| 28 | 1557.061 | 1517.827 | 1483.099 | 1488.748 | 1449.498 | 1414.757 |
| 29 | 1667.971 | 1625.950 | 1588.755 | 1594.805 | 1552.767 | 1515.557 |
| 30 | 1782.662 | 1737.760 | 1698.015 | 1704.480 | 1659.559 | 1619.797 |
| 31 | 1901.131 | 1853.254 | 1810.876 | 1817.769 | 1769.870 | 1727.473 |
| 32 | 2023.371 | 1972.426 | 1927.332 | 1934.667 | 1883.698 | 1838.582 |
| 33 | 2149.380 | 2095.273 | 2047.380 | 2055.170 | 2001.037 | 1953.120 |
| 34 | 2279.151 | 2221.790 | 2171.015 | 2179.274 | 2121.884 | 2071.084 |
| 35 | 2412.680 | 2351.972 | 2298.233 | 2306.975 | 2246.234 | 2192.468 |
| 36 | 2549.962 | 2485.814 | 2429.030 | 2438.267 | 2374.083 | 2317.268 |
| 37 | 2690.991 | 2623.311 | 2563.400 | 2573.145 | 2505.427 | 2445.482 |
| 38 | 2835.763 | 2764.459 | 2701.339 | 2711.606 | 2640.260 | 2577.102 |
| 39 | 2984.271 | 2909.251 | 2842.841 | 2853.643 | 2778.577 | 2712.127 |
| 40 | 3136.509 | 3057.682 | 2987.901 | 2999.252 | 2920.375 | 2850.549 |
| 41 | 3292.473 | 3209.748 | 3136.515 | 3148.427 | 3065.647 | 2992.366 |
| 42 | 3452.156 | 3365.442 | 3288.676 | 3301.163 | 3214.389 | 3137.572 |
| 43 | 3615.552 | 3524.758 | 3444.380 | 3457.454 | 3366.596 | 3286.161 |
| 44 | 3782.655 | 3687.690 | 3603.619 | 3617.295 | 3522.261 | 3438.129 |
| 45 | 3953.457 | 3854.233 | 3766.390 | 3780.679 | 3681.380 | 3593.470 |
| 46 | 4127.954 | 4024.380 | 3932.685 | 3947.601 | 3843.946 | 3752.179 |
| 47 | 4306.137 | 4198.125 | 4102.499 | 4118.054 | 4009.954 | 3914.251 |
| 48 | 4488.001 | 4375.461 | 4275.825 | 4292.033 | 4179.399 | 4079.679 |
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