Study of hydrogen isotopes behavior in tungsten by a multi trapping macroscopic rate equation model

被引：44

作者：

Hodille, E. A. ^{[1
]}

Ferro, Y. ^{[2
]}

Fernandez, N. ^{[2
]}

Becquart, C. S. ^{[3
]}

Angot, T. ^{[2
]}

Layet, J. M. ^{[2
]}

Bisson, R. ^{[2
]}

Grisolia, C. ^{[1
]}

机构：

[1] CEA Cadarache, IFRM, F-13108 St Paul Les Durance, France

[2] Aix Marseille Univ, CNRS, PIIM, UMR 7345, F-13397 Marseille, France

[3] Univ Lille 1, ENSCL, UMET, UMR 8207, F-59655 Villeneuve Dascq, France

来源：

PHYSICA SCRIPTA | 2016年 / T167卷

关键词：

tungsten; vacancy; fuel retention; DEUTERIUM RETENTION; THERMAL-DESORPTION; DIFFUSION; VACANCY; RELEASE;

D O I：

10.1088/0031-8949/2016/T167/014011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Density functional theory (DFT) studies show that in tungsten a mono vacancy can contain up to six hydrogen isotopes (HIs) at 300 K with detrapping energies varying with the number of HIs in the vacancy. Using these predictions, a multi trapping rate equation model has been built and used to model thermal desorption spectrometry (TDS) experiments performed on single crystal tungsten after deuterium ions implantation. Detrapping energies obtained from the model to adjust temperature of TDS spectrum observed experimentally are in good agreement with DFT values within a deviation below 10%. The desorption spectrum as well as the diffusion of deuterium in the bulk are rationalized in light of the model results.

引用

页数：6

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