Влияние 10 МэВ пучка электронов на люминесцентные свойства примесных центров MgAl2O4

Abstract

The luminescence spectra of transparent magnesium-alumia spinel ceramics at different temperatures before and after irradiation of 10 MeV with an electron beam were recorded. Under laser excitation with an energy of 2.53eV there is a luminescence band of 2.4 eV which is associated with impurity Mn2+ ions. In the range 1.5–1.85 eV, the luminescence of impurity Cr3+ (R, N-bands, as well as a series of phonon-replication bands) is recorded. The lumines-cence band with an energy of 2 eV, which is probably the luminescence of the manganese impurity ion is detected. The intensity of this band exhibits a temperature “buildup” with a peak at 200K.