The chemical history of molecules in circumstellar disks - I. Ices

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Table 2:

Binding energies and desorbing fractions for the four-flavour CO evaporation model^a.
Flavour	$E_{\rm b}({\rm CO})/k$ (K)^b	Fraction^c
1	855	0.350
2	960	0.455
3	3260	0.130
4	5773	0.065

^a Based on Viti et al. (2004).
^b The rates for Flavours 1-3 are computed from Eq. (36) with $X={\rm CO}$ . The rate for Flavour 4 is equal to the H₂O desorption rate.
^c These numbers indicate fractions of adsorbing CO: 35% of all adsorbing CO becomes Flavour 1, and so on.

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