Search results

Sort By:

Limit search:

Temperature Dependence of Luminescence Decay from the ^{4}G_{5/2} State of Sm^{3+} in Cs_{2}NaSm_{x}Y_{1-x}Cl_{6} and Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6}

100%

Luxbacher T., Fritzer H., Flint C.

Acta Physica Polonica A

1996

vol. 90

issue 2

307-313

Luminescence decay curves for the ^{4}G_{5/2} → ^{6}H_{7/2} emission of Sm^{3+} in the cubic hexachloroelpasolite crystals Cs_{2}NaSm_{x}Y_{1-x}Cl_{6} (x=0.005 to x=1) and Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6} (x=0.01 to x=0.95, y=0.05 to y =0.99) have been measured over the temperature range 10 K to 300 K using pulsed laser excitation into the ^{4}G_{5/2} state of Sm^{3+}. The luminescence from this state is strongly quenched by cross relaxation to Sm^{3+} acceptors and energy transfer to the ^{5}D_{0} state of Eu^{3+}. The temperature dependence of cross relaxation and of energy transfer is discussed in terms of the involved mechanisms.

Cross Relaxation and Energy Transfer in Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6}

100%

Luxbacher T., Fritzer H., Flint C.

Acta Physica Polonica A

1996

vol. 90

issue 1

161-168

Luminescence decay curves have been measured for the Sm^{3+} ^{4}G_{5/2} → ^{6}H_{7/2} emission in the cubic crystal Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{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 ^{4}G_{5/2} state of Sm^{3+}. The luminescence from the ^{4}G_{5/2} state of Sm^{3+} is strongly quenched by both, cross relaxation to nearest-neighbour Sm^{3+} ions and energy transfer to the ^{5}D_{0} state of Eu^{3+}. We interpret these processes in terms of a recently developed discrete shell model. The dependence of energy transfer from the Sm^{3+} donor ion to Eu^{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.

Refine search results

2 Acta Physica Polonica A

2 1996

2 Flint C.

2 Fritzer H.

2 Luxbacher T.

Search results

Temperature Dependence of Luminescence Decay from the ^{4}G_{5/2} State of Sm^{3+} in Cs_{2}NaSm_{x}Y_{1-x}Cl_{6} and Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6}

Cross Relaxation and Energy Transfer in Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6}