Orlando TM

Sieger MT

Siller L

The (C+, O+, CO+, O2+, D+, D3+) desorption yields during the (10-100 eV) electron beam irradiation of CO2 ice and of D2O adsorbed on CO2 ice were measured. Measurements of pure CO2 ice irradiated with 40-eV electrons suggest that pores in the CO2 are responsible for trapping molecular precursors for bimolecular reactions that are responsible for O2+ production. Investigations of pure CO2 ice irradiated with a 100-eV electron reveals production of O2+ by a second channel. It was found that D2O adsorbed on solid carbon dioxide at 30 K diffuses into solid CO2 due to exposure to the electron beam irradiation. Without radiation, D2O stays on the top of the CO2 ice

Electron-stimulated desorption of D<sub>2</sub>O coadsorbed with CO<sub>2</sub> ice at VUV and EUV energies

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