MAGNETIC CIRCULAR-DICHROISM IN THE LUMINESCENCE OF F AND FA CENTERS IN ALKALI-HALIDES

被引：2

作者：

BALDACCHINI, G

GRASSANO, UM

SCACCO, A

SOMAIAH, K

机构：

[1] ENEA, Dip. TIB, U.S. Fisica Applicata, CRE Frascati, Roma, 00044

[2] Dipartimento di Fisica, Università di Roma «Tor Vergata», Roma, 00173, Via Orazio Raimondo

[3] Dipartimento di Fisica, Università «La Sapienza», Roma, 00185

[4] Department of Physics, Osmania University, Hyderabad

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1990年 / 12卷 / 01期

关键词：

Magneto-optical effects; Solid alkali halides;

D O I：

10.1007/BF02453031

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic circular dichroism has been in the past an excellent tool to clarify the optical cycle of the F centres in alkali halides and the nature of the relaxed excited state. We have used such technique to study the weak double F emission found recently in NaI and the luminescence of F and FA centres (of both type I and II) in KCl. We have found that the long-wavelength F emission in NaI and the FA(I) emission in KCl∶Na+ behave like the well-known emission of the F centres, confirming the attribution of the above luminescence in NaI to the normal relaxed excited state. A completely different behaviour is displayed by the short-wavelength F emission in NaI and by the FA(II) emission in KCl∶Li+. The experimental data have been compared with the Ham and Grevsmuhl vibronic theory of the relaxed excited state. © 1990, Societá Italiana di Fisica. All rights reserved.

引用

页码：117 / 130

页数：14