Electron-induced processes in water ice and ice are important in planetary science. We have measured desorption yields of positive ion products produced as a result of exposing pure and adsorbed on ices to 10–100 eV (i.e., the vacuum-ultraviolet–extreme-ultraviolet energy region) electron beams. Measurements on pure ice irradiated with 40-eV electrons suggest that pores in the ice are responsible for trapping molecular precursors for bimolecular reactions that are responsible for production. Investigations of pure ice irradiated with a 100-eV electron beam reveals production of by a second channel attributed to post-ion molecule collisions that are strongly influenced by low-energy electrons trapped in the ice. The most significant finding is that the and yields as a function of both dose and time indicate that the adsorbed on at 30 K diffuses into the ice or desorbs into vacuum very rapidly. Both processes are a result of electron irradiation.
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Research Article| May 02 2003
Electron-stimulated desorption of coadsorbed with ice at VUV and EUV energies
M. T. Sieger;
L. Šiller, M. T. Sieger, T. M. Orlando; Electron-stimulated desorption of coadsorbed with ice at VUV and EUV energies. J. Chem. Phys. 15 May 2003; 118 (19): 8898–8904. https://doi.org/10.1063/1.1566931
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