Temperature effect on radiation induced optical absorption of lithium-lanthanum phosphate glass

The influence of temperature on radiation-optical properties of phosphate glass affected by γ-radiation, as well as at the moment of electron pulse action, was studied. Samples of lithium-lanthanum-phosphate glasses synthesized in oxidizing conditions were subjects of the investigation. After γ-irradiation irradiation temperature increase decreases intensity of bands of 260, 410 and 510 nm and optical density in the range of 200-800 nm in the glass spectrum. The same is observed for postradiation annealing. However, annealing rate of all the centres decreases as compared with experiments on γ-irradiation at increased temperatures. As a result of pulsed irradiation by electrons short-lived optical absorption appears with maxima on the wave lengths of 230, 280, 410 and 510 nm. In contrast to stationary γ-irradiation dependence of optical density on temperature is much less pronounced. The nature of colour centres is considered