For the sample at 370nm transmittance with the radiation dose curve, the sample transmittance decreased with the increase of dose, when the dose is greater than 2kGy, the transmittance is almost no longer decreased, but slightly after the dose is greater than 20kGy The increase is due to the fact that after the Y irradiation, the photons transfer part of the energy to the electrons. After the electrons are removed, they are captured again. They transfer the energy to the crystal lattice, and the energy is consumed by the thermal vibration of the lattice, which is generated in the ceramic. The localized annealing effect causes the holes in some energy levels to gain energy and escapes from the hole traps. When the irradiation dose increases to a certain extent, the rate of Y-irradiation holes trapping and hole trap escape The rate is balanced and the transmittance no longer changes. When the annealing effect is greater than the damage effect, the transmittance also rises.
For the irradiation dose of 3500kGy sample annealing at 370nm transmittance with temperature curve, can be seen from the figure, with the increase of annealing temperature, the transmittance gradually increased to reach the original transmittance at 400 °C. So by the formula. Beijing: Atomic Energy Press. 1988 S. Solid TL. Beijing Atomic Energy Press, 1993,46
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