4 February 1997 Radiation-induced electrical conductivity in MgO, Al2O3, and Gd3Ga5O12 single crystals
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Proceedings Volume 2967, Optical Inorganic Dielectric Materials and Devices; (1997) https://doi.org/10.1117/12.266515
Event: International Conference on Advanced Optical Materials and Devices, 1996, Riga, Latvia
Abstract
The radiation-induced electrical conductivity (RIC) of single crystals MgO, Al2 O3 and Gd3Ga5O12 (GGG) has been measured during gamma-neutron irradiation at dose rates between 102 and 106 Gy/h and temperature from 20 to 400 degrees Celsius. The RIC for these crystals varied in a linear manner with dose rate in temperature region 60 - 300 degrees Celsius. The activation energy of conductivity before irradiation above 230 degrees Celsius is 1.4 eV for MgO, 0.75 eV for Al2O3 and 0.57 eV for GGG. The activation energy decrease during irradiation and at high dose rates (greater than 105 Gy/h) electrical conductivity does not depend on temperature. Single crystal MgO irradiation at 320 degrees Celsius and dose rate 500 kGy/h in electrical field 10 kV/m shows no noticeable radiation-induced electrical degradation (RIED).
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Uldis Ulmanis, Uldis Ulmanis, } "Radiation-induced electrical conductivity in MgO, Al2O3, and Gd3Ga5O12 single crystals", Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); doi: 10.1117/12.266515; https://doi.org/10.1117/12.266515
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