TY - JOUR
T1 - Dose rate dependence of radiation induced conductivity for hydrogen-doped perovskite ceramics at 473 K
AU - Tsuchiya, B.
AU - Moroño, A.
AU - González, S. M.
AU - Hodgson, E. R.
AU - Nagata, S.
AU - Toh, K.
AU - Shikama, T.
PY - 2009/4/30
Y1 - 2009/4/30
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=64649086899&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=64649086899&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2008.12.133
DO - 10.1016/j.jnucmat.2008.12.133
M3 - Article
AN - SCOPUS:64649086899
VL - 386-388
SP - 342
EP - 344
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - C
ER -