Stable and transient color centers in Gd3Ga5O12 crystals

✍ Scribed by A. Matkovskii; P. Potera; D. Sugak; L. Grigorjeva; D. Millers; V. Pankratov; A. Suchocki

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 175 KB
• Volume: 39
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200310254

✦ Synopsis

Abstract

The work is devoted to investigation of stable color centers (CC) that are created in Gd~3~Ga~5~O~12~ (GGG) crystals under irradiation with γ‐quanta (E = 1.25 MeV, D = 10^5^ Gy ) as well as transient CC created in the crystals under irradiation with pulsed electron beam (E = 0.25 MeV, pulse duration 10 ns, fluence 10^12^ cm^‐2^, time interval of registration 0‐500 ns). On the basis of the performed study of optical absorption spectra of the as‐grown and irradiated crystals it was established the correlation between a defect subsystem of as‐grown crystals and a type of CC induced by radiation in the crystals. The role of Ca^2+^ dopant ions in the processes of CC formation is examined. Models of the stable and transient CC are proposed. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)