Dose rate dependence of radiation induced conductivity (RIC) of hydrogen doped yttrium-doped perovskite-type barium-cerium oxide ceramics (BaCe0.9Y0.1O3-δ) was investigated under 1.8 MeV electron irradiation within dose rate of 10-1000 Gy/s at temperature of 473 K. The RIC in the initial dose for the H-doped BaCe0.9Y0.1O3-δ exponentially increased as a function of dose rate, and eventually became about three orders of magnitude higher than the base conductivity without radiation. For the dose rates below 200 Gy/s, the RIC of the H-doped BaCe0.9Y0.1O3-δ was higher by one order of magnitude than that of the H-undoped one. The results may show that the RIC takes place due to hydrogen diffusion as well as electronic excitation, enhanced by ionizing effects. For the dose rate range 300-1000 Gy/s, the RIC of H-doped BaCe0.9Y0.1O3-δ is similar to that of H-undoped one. The radiation enhanced diffusion of constitutive oxygen dominates for the RIC.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering