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Luminescence decay curves have been measured from the 4S3/2 excited state of erbium(III) in the elpasolite lattice for a range of concentrations and temperatures. Cross relaxation occurs from this state involving a relaxation at the donor to the 4I9/2 state and a transition at the acceptor from the ground state to the 4I13/2 state. The decay curves are strongly temperature dependent, the cross relaxation becoming important at 80 K and above. A comparison with the decay curves calculated using a shell model of discrete acceptor distribution within the lattice is unsuccessful due to migration of the excitation energy within the lattice.
Maya Campbell andColin D. Flint
"Energy transfer from the 4S3/2 state of Cs2NaErxY1-xCl6", Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); https://doi.org/10.1117/12.293431
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Maya Campbell, Colin D. Flint, "Energy transfer from the 4S3/2 state of Cs2NaErxY1-xCl6," Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); https://doi.org/10.1117/12.293431