Open Access
Table B.2
Attempt frequencies for desorption and the different cases of diffusion considered in this work. Units in s−1. See that at 20 K kBT∕h ~ 4.2 × 1011, so the effect of entropy at such low temperatures is very small.
| Eyring equation (computed at 20 K) | Harmonic | ||||
|---|---|---|---|---|---|
| Desorption | Diffusion | oscillator | |||
| Diff-to-Des | – | 0.5 | 0.4 | 0.3 | – |
| ν(CH3) | 4.7 × 108 | 1.1 × 1011 | 1.4 × 1011 | 1.9 × 1011 | 1.5 × 1012 |
| ν(HCO) | 2.9 × 1010 | 1.4 × 1010 | 2.8 × 1010 | 5.4 × 1010 | 1.5 × 1012 |
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