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The thermoluminescence (TL) characterization of undoped and Lu3+ doped nanocrystalline ZrO2 under β-ray irradiation
is presented. The average crystallite size was 40 nm and the crystalline structure was monoclinic although for doped
samples 5 wt% of tetragonal was observed. The TL results show a typical second order kinetic with four TL peaks
centered around 120, 170, 240 and 280 °C when the sample is exposed to β-ray irradiation. The presence of dopant ion
induces changes in the trapping process and recombination efficiency in the TL response. The result is that dominant
peak typically centered at 120 °C was quenched while the peak centered at 240 °C was enhanced. This shifting to higher
temperature of the dominant peak induces important changes in the dosimetric properties of nanocrystals. The dosimetric
behavior for TL method and the TL fading of the samples under β-irradiation was systematically characterized as
function of the dopant concentration. The high efficiency of the TL suggest a good potential of this nanophosphor as β-
irradiation dosimeter.
V. H. Romero,E. De la Rosa,R. A. Rodríguez,P. Salas,R. Meléndrez, andM. Barboza-Flores
"Dopant concentration effect on the TL response of ZrO2:Lu3+ nanocrystals under β-ray irradiation", Proc. SPIE 6639, Nanophotonic Materials IV, 66390N (17 September 2007); https://doi.org/10.1117/12.739918
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V. H. Romero, E. De la Rosa, R. A. Rodríguez, P. Salas, R. Meléndrez, M. Barboza-Flores, "Dopant concentration effect on the TL response of ZrO2:Lu3+ nanocrystals under β-ray irradiation," Proc. SPIE 6639, Nanophotonic Materials IV, 66390N (17 September 2007); https://doi.org/10.1117/12.739918