| Autor: |
Khasanshin, R. H., Novikov, L. S. |
| Zdroj: |
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Nov2018, Vol. 12 Issue 6, p1088-1098, 11p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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