Analytical approach for description of deuterium content in deuterium-beryllium co-deposited layers

• Main Authors: S. Krat, Yu. Gasparyan, Ya. Vasina, A. Prishvitsyn, G.De Temmerman, A. Pisarev
• Format: Article
• Language: English
• Published: Elsevier 2021-03-01
• Series: Nuclear Materials and Energy
• Subjects: Co-deposition; Hydrogen accumulation; Beryllium; THIN films; Fuel accumulation; Modeling
• Online Access: http://www.sciencedirect.com/science/article/pii/S2352179121000405

Available literature data for beryllium content in D-Be co-deposited layers was modeled using newly developed model. It was shown that the model adequately describes the experimental results. An empirical scaling for the available trap concentrations as a function of deuteron energy was introduced in order to improve the agreement between the experimental data and model predictions. The limited recombination rate describes the co-deposition better than the unlimited one. Assuming two types of traps in the film with detrapping energies of 0.8–0.9 and 1.2–1.3 eV and trap concentrations of 10 at. % and 1 at. %, respectively, and the deuterium implantation energy of 15.6 eV, the average relative deviation between experimental and predicted D/Be values of 1.9 was observed, which is better than the empirical D/Be scalings.