Abstracts Book - IMRC 2018

• SE3-P004
THERMALLY STIMULATED LUMINESCENCE OF NOVEL La2O3
PHOSPHORS OBTAINED BY UREA-BASED SOLUTION
COMBUSTION SYNTHESIS
Adriana Guadalupe Lara González 1 , Victor Ramón Orante Barrón 1 , Catalina Cruz Vázquez 1 ,
Rodolfo Bernal Hernández 2
1 Universidad de Sonora, Departamento de Investigación en Polímeros y Materiales, Mexico.
2 Universidad de Sonora, Departamento de Investigación en Física, Mexico.
Novel thermoluminescence (TL) features of novel La 2 O 3 phosphors are reported
in this work. La 2 O 3 powder was obtained by urea-based solution combustion
synthesis (SCS), in which a redox combustion process between lanthanum
nitrate and urea at 500 °C is accomplished under stoichiometric conditions [1] .
The powder samples obtained were annealed at 900 °C during 2 h in air. The TL
glow curve obtained after exposure to beta radiation of these samples,
displayed two maxima located at ~ 101 °C, ~ 200 °C and a shoulder at ~ 270 °C.
Results experiments such as dose response and fading showed that annealed
La 2 O 3 powder obtained by SCS is a promising material for high-dose radiation
dosimetry applications.
[1] Shea, L. E., McKittrik, J. and Lopez, O. A. (1996). J. Am. Ceram. Soc. 79: 3257-
3265.
Keywords: Lanthanum oxide, Solution Combustion Synthesis, Thermoluminescence
dosimetry
Presenting authors email: adriana_lara91@hotmail.com