Effect of Pr3 concentration on thermoluminescence from K2Y1-xPrxF5 crystals

J. MARCAZZÓ; M. SANTIAGO; E. CASELLI; N. NARIYAMA; N.M. KHAIDUKOV

OPTICAL MATERIALS

Elsevier B.V.

Lugar: Amsterdam; Año: 2004 vol. 26 p. 65 - 70

0925-3467

Thermoluminescence dosimetric characteristics of K2YF5 crystals doped with Pr3+ are reported for the first time. The efficiency of the 0.5 at. % Pr3+ doped K2YF5 crystal has been found to be maximum for this concentration series and three times higher than that of the commercial dosimeter TLD-700. The thermoluminescence glow curve of this novel phosphor has no appreciable fading. Furthermore, it bears linear dose response and good stability after reutilization. According to these results, K2YF5:Pr3+ appears to be a promising base for developing effective phosphors for TL solid state dosimetry. In this context, the spectral composition of the TL emission is also mentioned along with the values obtained by glow curve deconvolution for the trap parameters characterising electron trap centres involved in thermoluminescence.