Abstract
A systematic study was carried out on the relation between the surface recombination rate constant of deuterium at a Nb surface and the oxygen concentration in bulk. Oxygen was introduced into a Nb specimen up to concentrations from 0.12 to 4.3 at.%. Then, deuterium was introduced into the specimen, and the surface recombination rate constant was measured by thermal desorption in a temperature range from 623 to 913 K. The surface recombination rate constant of deuterium decreased with increasing oxygen concentration in the solid solution phase. This reduction in the recombination rate constant was attributed to the increase of oxygen coverage at the surface with the bulk concentration. Irrespective of the bulk oxygen concentration, no significant increase was observed in the height of the potential barrier against desorption processes.
| Original language | English |
|---|---|
| Pages (from-to) | 113-116 |
| Number of pages | 4 |
| Journal | Physica Scripta T |
| Volume | 103 |
| State | Published - 2002 |
| Event | Proceedings of International Workshop on Hydrogen Isotopes in Fusion Reactor Materials - Tokyo, Japan Duration: 2002/05/22 → 2002/05/24 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics