Basic properties of radiation defects in halides, oxides and perovskites

Orateur : Anatoli POPOV (Institute of Solid State Physics, University of Latvia)

We present a short survey of the optical properties of primary radiation-induced point defects in alkali halides, simple oxides and some ABO3 perovskites. We discuss in details the optical properties of single electron F and F+ centers in rock-salt (f.c.c.) alkali halides and oxides and show that the Mollwo-Ivey law well-known for the F-type centers in alkali halides may be extended for other rock-salt structure insulators. We discuss also the correlation between the temperatures at which hole polarons start migration in a series of alkali halides (fluorites, chlorides, bromides, iodides) and the lattice displacement around quasi-molecule. We also discuss the major differences in point defect production mechanisms in halides, oxides and perovskites. We show that the Rabin-Klick diagram may be generalized for a whole family of alkali halides. The F-type center migration and aggregation into metal colloids in alkali halides and oxides is also discussed. Finally, the role and importance of F centers in radiation detection and 2D- imaging will be demonstrated.

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