Radiation phenomena in microinhomogeneous structures of flouroaluminate glass-like materials

The simulation of the fluoroaluminate matrix with small additives of phosphates has made it possible to create low-scattering glasses with a wide transparency window in the infrared region and to study the fundamental problem on the formation of radiation defects typical for the phosphate matrix (PO$_3^{2-}$ hole, PO$_3^{2-}$ electron, and PO$_4^{2-}$ hole defects). By comparing the spectra of induced optical absorption, electron paramagnetic resonance, and Raman scattering, it has become possible to investigate the generation of defects in the course of the successive formation of the phosphate matrix in fluoroaluminate glass. The feasibility of the formation of PO$_4^{2-}$ hole centers both in single tetrahedra and upon rupture of P–O–P bridge bonds with the simultaneous formation of PO$_3^{2-}$ electron centers has been shown. As a result of the revision of the nature and mechanisms of formation of radiation color centers in the studied glasses, it appears promising to introduce cerium (Ce$^{3+}$) and europium (Eu$^{3+}$) as protectors into these glasses.