Abstract
The low energy electron stimulated desorption yield of D − anions in pure multilayer D 2O films, and of O − in submonolayer O 2 covered D 2O films is strongly dependent on the D 2O condensation temperature (20–160 K) on Pt. Likewise the desorption of D + cations induced by oxygen 1 s excitation to the ground state empty levels of D 2O depends on ice condensation temperature. These observations are connected with the morphology of ice films which are microporous and amorphous at T < 90 K and crystalline at T > 150 K. Moreover both the change of morphology and related adsorption capacity of ice films with condensation temperature are observed in situ with x-ray absorption spectroscopy.
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