Abstract—
By the methods of atomic force microscopy (AFM) we investigate the surfaces of samples of K-208 glass after separate and combined irradiation in a vacuum chamber with a residual pressure of pv = 10−4 Pa with protons and electrons with energies of 20 and 30 keV, respectively. At flux densities of protons φp and electrons φe from 1011 to 5 × 1012 cm–2 s–1, the fluences of the particles Φp and Φe vary in the range of 1014–5 × 1016 cm–2. The obtained results allow us to state the following: the character of changes in the morphology of the samples under the action of protons and electron–proton plasma for φp <5 × 1012 cm–2 s–1 at φe: φp < 3 coincides and is due to radiation-stimulated stresses, reorganization of the glass network and the formation of gas-filled bubbles; at φp ≥ 5 × 1012 cm–2 s–1, the change in the morphology of the glass is determined by the mass transfer caused by local heating of the near-surface layer. In the case of proton irradiation, a model is proposed that describes the process of the field migration of sodium ions, which plays a key role in restructuring of the glass microstructure and the release of atoms of non-bridging oxygen.
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Khasanshin, R.H., Novikov, L.S. On the Role of the Proton Component in the Evolution of the Morphology of K-208 Glass under Combined Electron–Proton Irradiation. J. Surf. Investig. 12, 1088–1098 (2018). https://doi.org/10.1134/S1027451018050452
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DOI: https://doi.org/10.1134/S1027451018050452