The evaluation of site symmetry distortion for an impurity ion in cubic crystals is a problem which obtained attention from a number of investigators during the last decade. So far, all approaches were based on multi-parameter fittings of the experimental results by some theoretical curves. A new technique, described in this paper, makes it possible to obtain the site symmetry distortion parameter in a straightforward fashion directly from the experimental data. The method is based on precise measurements of the light polarization azimuth for a beam transmitted by a crystal with reorienting centres. Results are reported for F-A (Li) centres in KCl and RbCl.
Baldacchini, G., Boiko, S., Grassano, U.m., DE MATTEIS, F., Scacco, A., Tarasov, G., et al. (1995). Direct determination of site symmetry for F A centres in alkali halides. NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. D CONDENSED MATTER, ATOMIC, MOLECULAR AND CHEMICAL PHYSICS, BIOPHYSICS, 17(4), 411-424 [10.1007/BF02457343].
Direct determination of site symmetry for F A centres in alkali halides
GRASSANO, UMBERTO MARIA;DE MATTEIS, FABIO;
1995-01-01
Abstract
The evaluation of site symmetry distortion for an impurity ion in cubic crystals is a problem which obtained attention from a number of investigators during the last decade. So far, all approaches were based on multi-parameter fittings of the experimental results by some theoretical curves. A new technique, described in this paper, makes it possible to obtain the site symmetry distortion parameter in a straightforward fashion directly from the experimental data. The method is based on precise measurements of the light polarization azimuth for a beam transmitted by a crystal with reorienting centres. Results are reported for F-A (Li) centres in KCl and RbCl.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
