Table 2.
Photodissociation branching ratios of the channels C(3P) + O(1D), C(1D) + O(3P), and C(3P) + O(3P) for 12C18O in the region from 107 800–109 700 cm−1 (91.16–92.76 nm).
| Upper state | VUV (cm−1) | Rotational transition | C(3P) + O(1D) (%) | C(1D) + O(3P) (%) | C(3P) + O(3P) (%) |
|---|---|---|---|---|---|
| (4pπ) 1Π(v′ = 3) | 109 592.5 | Q | 2.9 ± 0.5 (b) | 1.7 ± 0.2 | 95.3 ± 0.6 |
| 50 Mb (a) | |||||
| (5pπ) 1Π(v′ = 1) | 109 425.6 | Q | 7.1 ± 0.2 | 3.2 ± 0.1 | 89.7 ± 0.3 |
| 50 Mb | 109 429.5 | R(0) | 4.1 ± 0.3 | 2.3 ± 0.2 | 93.6 ± 0.3 |
| 109 433.3 | R(1) | 2.9 ± 0.9 | 2.1 ± 0.1 | 95.0 ± 0.9 | |
| 109 437.9 | R(2) | 2.0 ± 0.4 | 2.0 ± 0.1 | 96.0 ± 0.3 | |
| 109 442.5 | R(3) | 1.9 ± 0.4 | 1.4 ± 0.5 | 96.6 ± 0.6 | |
| (4pσ) 1Σ+(v′ = 3) | 109 342.5 | 0 | 0.1 ± 0.1 | 99.9 ± 0.1 | |
| (4sσ) 1Σ+(v′ = 4) | 109 313.7 | 0 | 0.1 ± 0.1 | 99.9 ± 0.1 | |
| 50 Mb | 109 295.6 | 0.3 ± 0.1 | 0.1 ± 0.1 | 99.6 ± 0.1 | |
| (6pσ) 1Σ+(v′ = 0) | 109 169.4 | 3.9 ± 0.1 | 1.8 ± 0.1 | 94.3 ± 0.2 | |
| 50 Mb | 109 165.7 | 2.2 ± 0.2 | 1.2 ± 0.1 | 96.6 ± 0.3 | |
| 1Π(v′ = 2) | 108 903.1 | R(0) | 12.3 ± 0.2 | 37.7 ± 0.3 | 49.9 ± 0.4 |
| 50 Mb | 108 905.3 | R(1) | 11.8 ± 0.4 | 37.9 ± 0.7 | 50.3 ± 1.0 |
| 108 907.5 | R(2) | 12.8 ± 0.3 | 38.9 ± 0.6 | 48.4 ± 0.8 | |
| 108 898 | Q(1)/Q(2) | 12.2 ± 0.8 | 37.9 ± 0.2 | 49.9 ± 0.7 | |
| 108 895.1 | Q(3) | 12.9 ± 0.6 | 37.9 ± 0.6 | 49.1 ± 0.3 | |
| 108 893 | P(2)/Q(4) | 12.9 ± 0.8 | 37.9 ± 0.7 | 49.2 ± 1.1 | |
| 108 889.3 | Q(5) | 12.5 ± 0.4 | 36.8 ± 0.6 | 50.7 ± 0.9 | |
| 108 887.2 | P(3) | 12.7 ± 0.8 | 36.1 ± 0.1 | 51.3 ± 0.9 | |
| 108 881.4 | P(4) | 11.8 ± 1.1 | 35.5 ± 0.8 | 52.9 ± 1.8 | |
| 108 874.9 | P(5) | 11.0 ± 0.9 | 34.5 ± 1.4 | 54.4 ± 2.3 | |
| 108 867.6 | P(6) | 10.3 ± 0.8 | 29.0 ± 4.0 | 60.7 ± 4.7 | |
| (6sσ) 1Σ+(v′ = 0) | 108 802.8 | R(0) | 0.3 ± 0.1 | 0.6 ± 0.1 | 99.1 ± 0.1 |
| 50 Mb | 108 807.9 | R(1) | 0.8 ± 0.2 | 1.0 ± 0.2 | 98.3 ± 0.4 |
| 108 812.2 | R(2) | 1.3 ± 0.2 | 1.5 ± 0.1 | 97.2 ± 0.2 | |
| 108 817.2 | R(3) | 2.7 ± 0.2 | 2.5 ± 0.3 | 94.9 ± 0.1 | |
| 108 794.9 | P(1) | 0.2 ± 0.1 | 0.4 ± 0.1 | 99.4 ± 0.2 | |
| 108 792.1 | P(2) | 0.2 ± 0.1 | 0.5 ± 0.1 | 99.2 ± 0.1 | |
| 108 789.2 | P(3) | 0.6 ± 0.1 | 0.8 ± 0.1 | 98.6 ± 0.1 | |
| 108 786.3 | P(4) | 1.2 ± 0.1 | 1.2 ± 0.1 | 97.6 ± 0.2 | |
| New 1Π | 108 459.6 | Q | 30.8 ± 0.6 | 11.5 ± 0.3 | 57.7 ± 0.9 |
| 50 Mb | 108 463.1 | R(0) | 34.3 ± 0.8 | 11.4 ± 0.4 | 54.2 ± 1.2 |
| 108 466.5 | R(1) | 30.2 ± 0.9 | 10.4 ± 0.2 | 59.4 ± 1.1 | |
| 108 470 | R(2) | 26.2 ± 1.3 | 10.2 ± 0.7 | 63.7 ± 1.8 | |
| C′1Σ+(v′ = 9) | 108 407.8 | R(0)/R(1)/R(2) | 59.6 ± 0.8 | 13.5 ± 0.1 | 26.9 ± 0.9 |
| 50 Mb | 108 403.7 | R(3) | 57.8 ± 0.1 | 12.9 ± 0.5 | 29.3 ± 0.5 |
| 108 401.6 | P(1) | 59.4 ± 0.4 | 12.2 ± 0.4 | 28.5 ± 0.8 | |
| 108 395.5 | P(2) | 63.1 ± 2.0 | 11.7 ± 0.4 | 35.2 ± 2.4 | |
| 108 390 | P(3) | 51.0 ± 1.5 | 11.2 ± 0.4 | 37.9 ± 1.7 | |
| 108 380.3 | P(4) | 32.4 ± 2.5 | 7.4 ± 0.6 | 60.2 ± 3.1 | |
| (5dσ) 1Σ+(v′ = 0) | 108 350.9 | R | 0.4 ± 0.2 | 0.4 ± 0.2 | 99.2 ± 0.1 |
| 30 Mb | 108 354.3 | R | 0.9 ± 0.1 | 0.7 ± 0.1 | 98.5 ± 0.2 |
| 108 357.7 | R | 0.7 ± 0.1 | 0.6 ± 0.1 | 98.6 ± 0.2 | |
| 108 359.8 | R | 0.6 ± 0.1 | 0.7 ± 0.1 | 98.7 ± 0.1 | |
| 108 363.2 | R | 0.9 ± 0.1 | 0.7 ± 0.1 | 98.3 ± 0.1 | |
| 108 342.7 | P | 0.6 ± 0.2 | 0.6 ± 0.1 | 98.9 ± 0.1 | |
| 108 338.6 | P | 0.7 ± 0.2 | 0.6 ± 0.1 | 98.7 ± 0.2 | |
| 108 335.2 | P | 0.6 ± 0.1 | 0.5 ± 0.1 | 98.9 ± 0.1 | |
| 108 332.4 | P | 0.6 ± 0.1 | 0.5 ± 0.1 | 98.9 ± 0.1 | |
| W(3sσ) 1Π(v′ = 3) | 107 837.1 | R(0) | 3.8 ± 0.2 | 2.8 ± 0.1 | 93.4 ± 0.2 |
| 30 Mb | 107 839.6 | R(1) | 3.1 ± 0.1 | 2.2 ± 0.1 | 94.7 ± 0.1 |
| 107 841.7 | R(2) | 2.6 ± 0.1 | 1.9 ± 0.1 | 95.5 ± 0.1 | |
| 107 843.7 | R(3) | 2.3 ± 0.1 | 1.6 ± 0.1 | 96.1 ± 0.2 | |
| 108 338.6 | P | 0.7 ± 0.2 | 0.6 ± 0.1 | 98.7 ± 0.2 | |
| 108 335.2 | P | 0.6 ± 0.1 | 0.5 ± 0.1 | 98.9 ± 0.1 | |
| 108 332.4 | P | 0.6 ± 0.1 | 0.5 ± 0.1 | 98.9 ± 0.1 | |
| 108 342.7 | P | 0.6 ± 0.2 | 0.6 ± 0.1 | 98.9 ± 0.1 | |
| 107 832.7 | Q(1)/Q(2) | 4.2 ± 0.2 | 2.8 ± 0.1 | 93.0 ± 0.2 | |
| 107 831.2 | Q(3) | 4.3 ± 0.1 | 2.9 ± 0.1 | 92.8 ± 0.1 | |
| 107 829.8 | Q(4) | 4.2 ± 0.2 | 2.8 ± 0.2 | 92.9 ± 0.3 | |
| 107 827.2 | P(2)/Q(5) | 4.0 ± 0.1 | 2.5 ± 0.1 | 93.4 ± 0.1 | |
| 107 824.9 | Q(6) | 3.3 ± 0.3 | 2.7 ± 0.4 | 93.9 ± 0.1 | |
| 107 822.8 | P(3)/Q(7) | 3.2 ± 0.2 | 2.4 ± 0.3 | 94.3 ± 0.4 | |
| 107 818.5 | P(4)/Q(8) | 2.7 ± 0.4 | 1.9 ± 0.2 | 95.4 ± 0.2 | |
Notes.
Photoionization cross section values of C(1D) used for calibrating the measured photodissociation branching ratios; see the first paragraph in Sect. 3 for detail.
The error bars are the standard deviations (1σ) of three independent measurements, which do not include any possible systematic experimental uncertainties; see the second paragraph in Sect. 3 for detail.
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