| Popis: |
Absorption, emission, excitation, and lifetime data are presented for RbMn${\mathrm{F}}_{3}$:${\mathrm{Er}}^{3+}$. Evidence for ${\mathrm{Mn}}^{2+}$ \ensuremath{\rightarrow} ${\mathrm{Er}}^{3+}$ energy transfer was found from the ${\mathrm{Er}}^{3+}$ excitation spectra and the temperature dependence of the ${\mathrm{Mn}}^{2+}$ and ${\mathrm{Er}}^{3+}$ emissions. The presence of ${\mathrm{Er}}^{3+}$ in the lattice slightly changed the temperature dependence of the ${\mathrm{Mn}}^{2+}$ lifetime. Radiative and radiationless transitions are discussed in terms of the model of Flaherty and Di Bartolo and the quantum-mechanical single-configuration coordinate model of Struck and Fonger. |
