Effect of X-ray radiation on a potassium aluminaborate glass system

Abstract

Glass of the K2O–Al2O3–B2O3 system containing Ag, Sb, Ce, KCl, and KBr has been studied. It is shown that an intense additional absorption is induced in this glass by the action of X-ray radiation in the region of 300–400 nm, which is caused by the creation of hole centers. The assumption is expressed that ions of oxygen, chlorine, and bromine included in the environment of the aluninum tetrahedric complex are the donors of electrons generated under the action of X-ray radiation. The hypothesis is proposed about the inclusion of halides in the tetrahedric environment of aluminum (halide effect). It is shown that a red shift of the maximum in the induced absorption spectrum is observed in succession: oxygen, chlorine, and bromine. Ions and nanoparticles of silver, ions of Sb+5, and defects of matrix glass are the acceptors of the induced electrons. The acceptor properties in this succession are increased, which leads to an increase in the induced absorption intensity.