Mathematical study of the thermoluminescence process in K₂YF₅:Tb³⁺

Abstract

This paper presents results of studying the simulated thermoluminescence (TL) glow curve in potassium-yttrium double fluoride doped with trivalent optically active Tb(3+) ions (K2YF5:Tb(3+)). Samples have been irradiated with different doses (0.24, 2.4 and 24 Gy) of beta particles. Four trapping states and one kind of recombination-centre model have been used in this simulation. The activation energy and order of kinetics are determined using the general-order kinetic model. The results obtained using the authors' proposed models were tested and compared with the experimental glow curve of K2YF5:Tb(3+). The comparison has shown that the proposed model can predict more accurately and easily the behaviour of the TL glow curve at three different doses.

VUV spectroscopy of lanthanide doped fluoride crystals K2YF5

“…For these reasons, fluoride crystals doped with Ln ions are very suitable for solid-state lasers and optical amplifiers [7,8,10]. In particular, K2YF5:Ln 3+ single crystals have been widely studied because of their application abilities for lasers, light frequency converters [4,[11][12][13] and especially they have a great potential in the high energy dosimetry [14][15][16][17]. The structural studies have shown that K2YF5 crystals crystallize in the orthorhombic system with space group Pnam.…”