Abstract
Photoluminescence(PL), photostimulated luminescence(PSL) and thermoluminescence(TL) in <TEX>$SrC1_2$</TEX>:<TEX>$Eu^{2+}$</TEX> , <TEX>$Na^{+}$</TEX> phosphor powder were measured, and the activation energies(trap depth) of traps associated with TL and PSL were investigated. The PL and PSL in the studied sample is due to the <TEX>$4f^{6}$</TEX> 5d\longrightarrow<TEX>$4f^{7}$</TEX>transition of <TEX>$Eu^{ 2+}$</TEX>. TL glow curve is single peak, and its peak temperature is about 377.2 K. The PL, PSL and TL emission spectra of the phosphors are located in the range of 380∼440 nm, peaking at 408 nm. The activation energy of the PSL trapping center is 0.78 eV and that of the TL trapping center is 0.79 eV. We, thus, suggest that the trapping centers giving rise to the PSL are identical to those giving rise to the TL.
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