Thermal evolution spectrometry of low energy helium ions injected into stainless steel and nickel targets
| Autor: | D.G. Armour, DJ Reed, G. Carter, F T Harris |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
inorganic chemicals
Materials science Annealing (metallurgy) Gas evolution reaction Metallurgy technology industry and agriculture Analytical chemistry chemistry.chemical_element Activation energy Condensed Matter Physics Fluence Surfaces Coatings and Films Nickel Ion implantation chemistry Instrumentation Single crystal Helium |
| Zdroj: | Vacuum. 24:179-186 |
| ISSN: | 0042-207X |
| DOI: | 10.1016/0042-207x(74)90052-9 |
| Popis: | Low energy helium ions have been injected into 304 stainless steel, polycrystalline nickel foil and single crystal nickel targets and the gas evolution rate monitored during post-bombardment annealing. Peaks in the observed spectra have been associated with annealing of radiation damage, normal diffusion and with processes involving helium-vacancy agglomerates. Activation energies for evolution have been deduced and values in good agreement with previously published experimental and theoretical results have allowed identification of some of the processes. Entrapment probabilities have also been measured and found to be lower in stainless steel than in nickel due mainly to the inability to remove all the gas implanted into the steel without melting it. The marked fluence dependence of the entrapment probability in single crystal nickel for the higher energy (1 keV) and high fluence (10 15 –10 16 ions cm -2 ) range investigated illustrated the importance of gas atom-defect interactions in the migrational behavior of helium in this material. |
| Databáze: | OpenAIRE |
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