Type-I or type-II behaviour of the F A centres in alkali halides has always been thought of as a feature dependent on the crystal lattice parameter and on the impurity size. We have found experimental evidence suggesting for the first time that both behaviours are present in RbCl:Li + , where the F A centre at low temperature ( T < 15 K) exhibits a luminescence of type-I switching to type-II at higher temperature. This effect is probably related to the possibility for the Li + ion of being, at high temperature, a mobile and off-centre ion. Both these conditions seem to be necessary for having a type-II behaviour.

Baldacchini, G., Giovenale, E., DE MATTEIS, F., Scacco, A., Somma, F., Casalboni, M., et al. (1988). New Luminescence of the F A Centre in RbCl:Li +. EUROPHYSICS LETTERS, 7(7).

New Luminescence of the F A Centre in RbCl:Li +

DE MATTEIS, FABIO;CASALBONI, MAURO;
1988

Abstract

Type-I or type-II behaviour of the F A centres in alkali halides has always been thought of as a feature dependent on the crystal lattice parameter and on the impurity size. We have found experimental evidence suggesting for the first time that both behaviours are present in RbCl:Li + , where the F A centre at low temperature ( T < 15 K) exhibits a luminescence of type-I switching to type-II at higher temperature. This effect is probably related to the possibility for the Li + ion of being, at high temperature, a mobile and off-centre ion. Both these conditions seem to be necessary for having a type-II behaviour.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - Fisica della Materia
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/01 - Fisica Sperimentale
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali
English
http://stacks.iop.org/0295-5075/7/i=7/a=013
Baldacchini, G., Giovenale, E., DE MATTEIS, F., Scacco, A., Somma, F., Casalboni, M., et al. (1988). New Luminescence of the F A Centre in RbCl:Li +. EUROPHYSICS LETTERS, 7(7).
Baldacchini, G; Giovenale, E; DE MATTEIS, F; Scacco, A; Somma, F; Casalboni, M; Grassano, U
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/130577
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