Recombination-assisted creation of cation excitons and cross-luminescence quenching in CsCl crystals at high excitation densities

At high excitation densities, recombination-assisted creation of cation exc itons, which transfer energy efficiently to the anion sublattice to initiat e the luminescence of anion excitons and impurity centers, has been observe d in CsCl crystals. At the same time, the creation of cation excitons compe tes with the electron recombination with cation holes and quenches the cros s-luminescence. The intensity ratio of the cross-luminescence to exciton-im purity luminescence is different for crystal irradiation with gamma rays an d heavy particles. (C) 2000 MAIK "Nauka/Interperiodica".