Thermoluminescence in calcium fluoride doped with terbium and gadolinium ions

Optical absorption and thermoluminescence studies in 100MeV swift heavy ion irradiated CaF2 crystals

“…Manrique et al proved that electron irradiated CaF 2 crystals show TL glows at 100 and 250 K [25]. Fukuda showed that pure CaF 2 crystals exposed to UV ray radiation exhibit two glows at $350 and 450 K [26]. The TL glow at 510 K in the present study is attributed to recombination of F-center and/or Mcenters electrons with holes at suitable lattice sites.…”

“…In the present study this is revealed by the increase in TL intensity with increase of ion fluence. Considerable deviations in the glow peak temperatures are reported for pure CaF 2 samples by different workers depending upon the crystal growth conditions, irradiation atmosphere and heating rate [22][23][24][25][26]. Rao reported that electron irradiated pure CaF 2 single crystals showed TL glow at $513 K [23].…”

Electron–hole and excitonic processes in CaSO4 doped with Gd3+, Tb3+ and Dy3+ luminescent ions

“…The most intense TSL peaks at 240, 310 and 380 K were not detected for the emission of Gd 3+ centers (4 eV). The hole-electron mechanism of the excitations of Dy 3+ in CaSO 4 :Dy was suggested [12]: f 9 -f 9 radiative transitions in Dy 3+ occur due to the energy released at the recombination of the holes becoming mobile at the sample heating with the electrons localized at/near Dy 3+ .…”

“…CaSO 4 -based materials also belong to few wide-gap dielectrics where the existence of selftrapping excitons with a complex structure is expected [5,[7][8][9]. The use of Ce 3+ [8,10], Dy 3+ [2,4], Pr 3+ [5], Tb 3+ [6] and Gd 3+ [11,12] ions (RE 3+ ) as luminescent probes allows to conclusively separate intrinsic and impurity emissions in various fluorides and oxides.…”

Synthesis and Characterization of CaF2 NPs with Co-precipitation and Hydrothermal Method

“…The most important quality features of Calcium Fluoride include excellent UV transmittance [6][7][8][9]. On the other hand the photoluminescence properties of this material when doped with some rare earth ion, made it more important [10], also its uses in tribology as an additive of lubricating [11]. Furthermore, Calcium Fluoride has become very interesting as an ultraviolet optical material for integrated circuit lithography in beam delivery [7].…”