- Tytuł:
- Cross Relaxation and Energy Transfer in Cs$\text{}_{2}$NaSm$\text{}_{x}$Eu$\text{}_{y}$Y$\text{}_{1-x-y}$Cl$\text{}_{6}$
- Autorzy:
-
Luxbacher, T.
Fritzer, H. P.
Flint, C. D. - Powiązania:
- https://bibliotekanauki.pl/articles/1945499.pdf
- Data publikacji:
- 1996-07
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
33.5.-j
34.50.Gb
78.55.Hx - Opis:
- Luminescence decay curves have been measured for the Sm$\text{}^{3+}$ $\text{}^{4}$G $\text{}_{5}\text{}_{/}\text{}_{2}$ → $\text{}^{6}$H $\text{}_{7}\text{}_{/}\text{}_{2}$ emission in the cubic crystal Cs$\text{}_{2}$NaSm$\text{}_{x}$Eu$\text{}_{y}$Y$\text{}_{1-x-y}$Cl$\text{}_{6}$ (x = 0.005 to x = 1, y = 0 to y = 0.99) over the temperature range 10 K to 300 K using pulsed laser excitation into the $\text{}^{4}$G $\text{}_{5}\text{}_{/}\text{}_{2}$ state of Sm$\text{}^{3+}$. The luminescence from the $\text{}^{4}$G $\text{}_{5}\text{}_{/}\text{}_{2}$ state of Sm$\text{}^{3+}$ is strongly quenched by both, cross relaxation to nearest-neighbour Sm$\text{}^{3+}$ ions and energy transfer to the $\text{}^{5}$D$\text{}_{0}$ state of Eu$\text{}^{3+}$. We interpret these processes in terms of a recently developed discrete shell model. The dependence of energy transfer from the Sm$\text{}^{3+}$ donor ion to Eu$\text{}^{3+}$ acceptor ions on y is readily studied and modelled. The temperature dependence shows that the cross relaxation occurs mainly by electric dipole vibronic-electric dipole vibronic interaction while in the energy-transfer process magnetic dipole allowed electronic contributions are also involved.
- Źródło:
-
Acta Physica Polonica A; 1996, 90, 1; 161-168
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł