Influence of γ-Irradiation on Some Properties of NaCl: Eu++ Crystals (I). Optical and Dielectrical Characteristics of the Dopant Ions

✍ Scribed by Dr. M. Suszynska; H. Opyrchal; K. D. Nierzewski; B. Macalik; A. Gubanski

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 476 KB
• Volume: 21
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170210729

✦ Synopsis

Influence of ?-Irradiation on Some Properties of NaCl: Eu++ Crystals (I)

Optical and Dielectrical Characteristics of the Dopant Ions

The present work opens a series of papers describing a variety of properties of the same material, and deals with the effect of Eu++ ions, and y-irradiation on the optical and dielectrical characteristics of NaCl crystals. For nonirradiated crystals four types of Eu+ +related absorption spectra have been identified and correlated with I.V. dipoles and three types of precipitates stable in the well aged crystals. For the solution-treated samples the effect of irradiation was t o diminish the concentration of I.V. dipoles and to change the absorption spectrum in a remarkable way. These changes are explained in terms of the formation of some dopant-related clusters different of those obtainable thermally. No spectroscopic evidences have been obtained for the radiation-induced changes of the valence state of the dopant irrespective of its dispersion degree.