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Table 6
Isotopic fractionation ratios at 10 K for three H2 densities, n(H2).
| Model A: LGFA84 | Model B: Present results | ||||||
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| n(H2) (cm-3) | Species | xa,b | R A | a,b | R B | δ (%) | |
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| 104 | 12C16O | 6.93(–5) | 6.93(–5) | ||||
| 13C16O | 1.15(–6) | 60.1 | 1.15(–6) | 60.1 | |||
| 12C18O | 1.22(–7) | 566 | 1.31(–7) | 529 | 6.5 | ||
| 13C18O | 2.13(–9) | 32 564 | 2.28(–9) | 30 322 | 6.9 | ||
| H12C16O+ | 7.74(–9) | 7.72(–9) | |||||
| H13C16O+ | 1.54(–10) | 50.3 | 1.74(–10) | 44.2 | 12.0 | ||
| H12C18O+ | 1.80(–11) | 430 | 1.68(–11) | 459 | –6.7 | ||
| H13C18O+ | 3.39(–13) | 22 812 | 3.69(–13) | 20 919 | 8.3 | ||
| D12C16O+ | 2.08(–10) | 2.06(–10) | |||||
| D13C16O+ | 3.60(–12) | 57.7 | 5.13(–12) | 40.2 | 30.4 | ||
| e− | 3.81(–8) | 3.81(–8) | |||||
| 105 | 12C16O | 6.97(–5) | 6.97(–5) | ||||
| 13C16O | 1.16(–6) | 60.1 | 1.16(–6) | 60.2 | |||
| 12C18O | 1.00(–7) | 695 | 1.21(–7) | 577 | 17.0 | ||
| 13C18O | 1.82(–9) | 38 207 | 2.21(–9) | 31 556 | 17.4 | ||
| H12C16O+ | 3.01(–9) | 2.98(–9) | |||||
| H13C16O+ | 7.70(–11) | 39.1 | 1.05(–10) | 28.5 | 27.1 | ||
| H12C18O+ | 8.20(–12) | 367 | 7.09(–12) | 421 | –14.7 | ||
| H13C18O+ | 1.87(–13) | 16 144 | 2.34(–13) | 12 782 | 20.8 | ||
| D12C16O+ | 7.45(–11) | 7.29(–11) | |||||
| D13C16O+ | 1.30(–12) | 57.2 | 2.93(–12) | 24.8 | 56.6 | ||
| e− | 1.04(–8) | 1.04(–8) | |||||
| 106 | 12C16O | 6.98(–5) | 6.98(–5) | ||||
| 13C16O | 1.16(–6) | 60.0 | 1.16(–6) | 60.1 | |||
| 12C18O | 7.87(–8) | 887 | 1.10(–7) | 632 | 28.7 | ||
| 13C18O | 1.41(–9) | 49 568 | 2.00(–9) | 34 948 | 29.5 | ||
| H12C16O+ | 1.02(–9) | 9.97(–10) | |||||
| H13C16O+ | 3.33(–11) | 30.6 | 5.67(–11) | 17.6 | 42.5 | ||
| H12C18O+ | 3.18(–12) | 321 | 2.56(–12) | 389 | –21.1 | ||
| H13C18O+ | 8.77(–14) | 11 624 | 1.33(–13) | 7480 | 35.7 | ||
| D12C16O+ | 2.45(–11) | 2.33(–11) | |||||
| D13C16O+ | 4.21(–13) | 58.2 | 1.63(–12) | 14.3 | 75.4 | ||
| e− | 3.03(–9) | 3.03(–9) | |||||
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