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- Title
The Recombination of Tungsten Intrinsic Defects near the Surface Blocked by Hydrogen and Helium Atoms.
- Authors
Shutikova, M. I.; Degtyarenko, N. N.; Pisarev, A. A.
- Abstract
Stable configurations of point radiation defects of tungsten near the surface were investigated within the density functional theory. The emergence of an self-interstitial atom leads to formation of a crowdion. The transformation of this configuration into a configuration with an adsorbed W atom is a thermally activated process with the energy barrier of 1.38 eV. When a single vacancy emerges near the crowdion close to the surface, a recombination occurs. Impurity atoms in the vacancy near the surface are capable of blocking the recombination process, acting as a factor that increases the radiation damage of tungsten.
- Subjects
ATOMIC recombination; TUNGSTEN; HYDROGEN; HELIUM; POINT defects
- Publication
Physics of Atomic Nuclei, 2018, Vol 81, Issue 11, p1580
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/S1063778818110200