Author/Authors :
Nepomnyashchikh، نويسنده , , A.I and Radzhabov، نويسنده , , E.A and Egranov، نويسنده , , A.V and Ivashechkin، نويسنده , , V.F and Istomin، نويسنده , , A.S، نويسنده ,
Abstract :
In this work, we carry out investigation of the suppression of the self-trapped exciton emission in BaF2:La crystals with various La concentrations (up to 5%), including measurements of thermo-luminescence, optical absorption of hole centers in the temperature range from 77 K to room temperature. Exciton luminescence was also investigated. Two luminescence bands at 4.0 and 3.67 eV were observed. It was concluded that the 4.0 eV emission band belongs to weakly perturbed excitons, while the 3.67 eV band belongs to strongly perturbed excitons.
