Helium/hydrogen synergistic effect in reduced activation ferritic/martensitic steel investigated by slow positron beam |
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| Authors: | Te Zhu Liping Guo Yuanchao Hu Eryang Lu Jianping Wu |
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| Institution: | 1. Multidiscipline Research Center, Institute of High Energy Physics, CAS, Beijing, China;2. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, China;3. School of Physics and Technology, Wuhan University, Wuhan, China;4. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, China |
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| Abstract: | Here, we investigated the irradiation defect in reduced activation ferritic/martensitic steels by slow positron beam. Three ion-irradiation experiments were carried out: (i) He2+ irradiation, (ii) H+ irradiation and (iii) He2+ irradiation followed by H+ irradiation, at temperature 450?°C. The presences of vacancy defects, represented by ?SHe+H parameter, induced by sequential irradiations was larger than the sum of defects, ?SHe parameter + ?SH parameter, caused by single He ions and single H ions. The synergistic effect of He and H was confirmed clearly from the perspective of positron annihilation spectroscopy. |
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| Keywords: | Synergistic effect helium/hydrogen slow positron beam vacancy defect |
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