Table 2: Absolute probabilities for removal of H₂O from an amorphous ice surface (per absorbed UV photon) as functions of monolayer.

ML	H2Oa	(a)	(b)	(c)
	desorption	H2O	H2O	H + OH
	probability	intact	intact	fragments
1	0.027	0.10	0.17	0.73
2	0.019	0.16	0.24	0.60
3		0.43	0.26	0.31
4		1.00	0.00	0.00
5		1.00	0.00	0.00

^a Probability for desorption as H₂ O or H + OH.