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

C. K. Duan; A. Mejerink; R. J. Reeves; M. F. Reid

doi:10.1016/j.jallcom.2005.01.077

paper

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

arXiv:cond-mat/0505592 · doi:10.1016/j.jallcom.2005.01.077

Abstract

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 $4 f^{6} 5 d$ states involved in the fluorescence.

10 pages, 2 figures, to appear on Journal of Alloys and Compounds

The unusual temperature dependence of the Eu2+ fluorescence lifetime in CaF2​ crystals

Abstract

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