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Sputtering of solid argon by keV electrons

  • Surfaces, Interfaces, and Layer Structures
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Abstract

Sputtering of the solid rare gas Ar by 0.8-3.0 keV electrons was studied experimentally and theoretically. The argon films were deposited on a quartz-crystal microbalance kept at liquid-helium temperature. The yield was determined from the mass loss during irradiation. The absolute yield shows a significant dependence on film thickness in accordance with earlier measurements on electronic sputtering of solid argon. The yield shows a maximum of about 3.0±0.4 Ar/elec. at 1.5 keV. The thickness dependence reflects the mobility of electronic excitations created by the primary electrons. The data analysis is based on a theoretical treatment for the diffusive motion of these excitations. From the thickness as well as the energy dependence of the yield we may derive a characteristic diffusion length for the excitations of 200–300 Å.PACS: 61.80 Fe, 66.30 Lw, 79.20 Kz

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Ellegaard, O., Pedrys, R., Schou, J. et al. Sputtering of solid argon by keV electrons. Appl. Phys. A 46, 305–312 (1988). https://doi.org/10.1007/BF01210351

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