High-dose neutron induced radiation swelling simulated by heavy ion irradiation and its microscopic study with positron annihilation technique

High-dose neutron induced radiation swelling simulated by heavy ion irradiation and its microscopic study with positron annihilation technique 1 first-author 2 2 2 2 2 2 2 Department of Physics, Xinjiang University, Xinjiang 830046; Department of Physics, Xinjiang University, Xinjiang 830046; China Institute of Atomic Energy, Beijing 102413 China Institute of Atomic Energy, Beijing 102413 70 MeV-carbon-ion irradiation is used to simulate the radiation swelling induced by neutron irradiation of 3.2×10 22 n•cm -2 in domestically-made 316 austenitic stainless steels modified by a 20%-cold-working and Ti-adding from room temperature to 802℃. The created swelling is microscopically examined by the positron annihilation lifetime technique. A radiation swelling peak is observed at 580℃ and the corresponding void has an average diameter of 0.7nm which is hardly probed by macroscopic methods. Stainless steel Radiation swelling Heavy ion irradiation simulation Positron annihilation lifetime technique References Exel K , Humbach W , Leister K H et al . in: Nuclear physics methods in materials research , Bethge K , Baumann H et al Ed. 1980 , 478 Nuclear physics methods in materials research Vehanen A , Hautojarvi P et al . Phy Rev , 1982 , B25 : 762 Phy Rev Hautojarvi P. Positron in solids . Berlin, Heidelberg, New York : Springer-Verlag , 1979 Positron in solids Hautojarvi P et al . Philos Mag , 1977 , 35 : 973 Philos Mag Iakubov I T , Pogosov V V. Materials Science Forum , 1995 , 169 : 175 ~ 178 Materials Science Forum Puska M J , Nieminen R M. J Phys , 1983 , F13 : 333 J Phys TL341, TL352.2 + 8, O59 The project supported by the National Natural Science Foundation of China 1999-08-19 2000-02-01 2021-02-05 2000 Nuclear Science and Techniques 1 11