The unusual temperature dependence of the Eu$^{2+}$ fluorescence lifetime in CaF$_2$ crystals

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Fluorescence lifetimes of Eu$^{2+}$ doped in CaF$_2$ are measured at various temperatures between 4K and 450K. The lifetime increases with between 100K and 300K, in contrast to the usual lifetime-temperature dependence. At higher or lower temperatures the lifetime decreases with increasing temperature. The phenomenon is explained by simulation of the energy levels and lifetimes of low-lying $4f^65d$ states involved in the fluorescence.
10 pages, 2 figures, to appear on Journal of Alloys and Compounds

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Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/26409

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0505592
 http://arxiv.org/abs/cond-mat/0505592
 doi:10.1016/j.jallcom.2005.01.077

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arXiv