Nuclear reaction analysis of deuterium in deuterided Zr-2.5 wt% Nb alloy |
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| Affiliation: | 1. CEA, DEN, Centre de Cadarache, F-13108 Saint-Paul-lez-Durance, France;2. CEA, Agence ITER-France, F-13108 Saint-Paul-lez-Durance, France;3. CEA, DEN/DADN, Centre de Saclay, F-91191 Gif-sur-Yvette cedex, France;1. Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden;2. Atomic Physics and Surface Science, Johannes Kepler University, A-4040 Linz, Austria;3. Institute of Physics, Federal University of Rio Grande do Sul, BR-91500-970, Porto Alegre, Brazil;4. Institute of Physics, University of Sao Paulo, Rua do Matao 173, 05508-100 Sao Paulo, Brazil;1. Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan;2. Department of Chemistry, Graduate School of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan;3. Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22, Shirakata-shirane, Tokai, Naka 319-1188, Ibaraki, Japan;4. The University Museum, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan;1. Sandia National Laboratories, Hydrogen and Metallurgical Science Department, Livermore, CA 94551, USA;2. University of Tennessee, Department of Nuclear Engineering, Knoxville, TN 37996, USA |
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| Abstract: | The deuterium concentration of homogeneous bulk levels in Zr-2.5 wt% Nb alloy has been measured by nuclear reaction analysis. The accuracy is ± 10% which is comparable to the accuracy of gas analytical techniques. A large surface peak is seen in all the samples due to a deuteride rich layer less than 20 nm thick. The deuterium concentration in this surface layer is more than 10 times the bulk value.At high ion beam fluences, significant effects due to the analysing beam are seen in the deuterium depth distribution. These are ascribed to deuterium trapping in the 3He implanted region, deuterium diffusion and dissolution of deuterides.These samples are not recommended as general deuterium standards for ion beam analysis experiments because of ion beam effects and the presence of a surface peak. However, they still serve as a useful reference when care is taken to avoid effects due to high fluences. |
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