New model for assessing dose, dose rate, and temperature sensitivity of radiation-induced absorption in glasses

International audienceA new theoretical approach is proposed to explain dose, dose rate and temperature sensitivity of Radiation-Induced Absorption (RIA) in glasses. In this paper a βth-order dispersive kinetic model is used to simulate the growth of the color center density in irradiated glasses. This model yields an explanation of power-law dependency on dose and dose rate usually observed for optical fiber RIA. It also leads to an Arrhenius-like relationship between RIA and glass temperature during irradiation. With a very limited number of adjustable parameters, it succeeds in explaining, with a good agreement, RIA growth of two different optical fibes references over wide ranges of dose, dose rate andtemperature