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Two-photon spectroscopy in KCl: Eu 2 +

1986; American Physical Society; Volume: 34; Issue: 4 Linguagem: Inglês

10.1103/physrevb.34.2936

1095-3795

M. Casalboni, R. Francini, U. M. Grassano, R. Pizzoferrato,

Lanthanide and Transition Metal Complexes

Two-photon excitations of the $f\ensuremath{\rightarrow}f$ transitions in ${\mathrm{Eu}}^{2+}$-doped KCl have been studied. The splitting of the $^{8}S_{\frac{7}{2}}\ensuremath{\rightarrow}^{6}P_{\frac{7}{2}}$ transition confirms that the symmetry of the ${\mathrm{Eu}}^{2+}$ ion is lower than cubic because of the presence of a charge-compensating cation vacancy. $^{6}D$ and $^{6}I$ multiplets have also been measured and their centers of gravity are compared with those observed in Ca${\mathrm{F}}_{2}$:${\mathrm{Eu}}^{2+}$.