Please use this identifier to cite or link to this item:
|Title:||Thermoluminescence properties of undoped and Tb3+ and Ce3+ doped YAG nanophosphor under UV-, X- and ?-ray irradiation|
De La Rosa, E.
|Abstract:||The thermoluminescence (TL) and optically stimulated luminescence (OSL) characterization of Er3+ and Yb3+ doped Y 3Al5O12 nanocrystalline samples prepared by the precipitation process and exposed to ?-rays are discussed. The TL as well as the OSL were two orders of magnitude higher in Er3+ doped than in Yb3+ specimens. The charge trapping and the radiative thermally stimulated recombination processes in Y3Al5O12 : Er3+ involve four trapping states at 166, 243, 342 and 424 °C, but just two trapping levels at 219 and 413 °C for Y3Al 5O12 : Yb3+ at a heating rate of 10 °C s-1. The photostimulation with 470 nm light causes in both phosphors a radiative recombination of the optically free charge carriers belonging to the same trapping states. The TL and the OSL as a function of radiation dose behaviour were linear in the 10-100 Gy dose range. The results provide evidence of the potential uses of these materials in radiation storage and dosimeter devices. " 2005 IOP Publishing Ltd.",,,,,,"10.1088/0022-3727/38/21/004",,,"http://hdl.handle.net/20.500.12104/45345","http://www.scopus.com/inward/record.url?eid=2-s2.0-27544465259&partnerID=40&md5=4ea4260b44e2a18117914c16b49dd140",,,,,,"21",,"Journal of Physics D: Applied Physics",,"3854|
WOS",,,,,,,,,,,,"Thermoluminescence and optically stimulated luminescence properties of nanocrystalline Er3+ and Yb3+ doped Y3Al 5O12 exposed to ?-rays",,"Article" "47127","123456789/35008",,"De la Rosa, E., Centro de Investigaciones en óptica, A.P. 1-948, León, Gto. 37150, Mexico; Rodríguez, R.A., Universidad de Guadalajara, CULAGOS, Lagos de Moreno, Jal. 47460, Mexico; Meléndrez, R., Centro de Investigación en Física, Universidad de Sonora, P.O. Box 5-088, Hermosillo, Sonora 83190, Mexico; Salas, P., Instituto Mexicano del Petruleo, Eje Central Lazaro Cardenas 152, C.P. 07730 México, D.F, Mexico; Diaz-Torres, L.A., Centro de Investigaciones en óptica, A.P. 1-948, León, Gto. 37150, Mexico; Barboza-Flores, M., Centro de Investigación en Física, Universidad de Sonora, P.O. Box 5-088, Hermosillo, Sonora 83190, Mexico",,"De la Rosa, E.
Barboza-Flores, M.",,"2007",,"The thermoluminescence (TL) properties of undoped, Ce3+ and Tb3+ doped Y3Al5O12 (YAG) nanocrystals under UV-, X- and ?-rays irradiation is reported. The TL signal of undoped and doped samples indicates a high sensitivity to UV-, X- and ?-ray irradiation. The introduction of the doping ions induces changes in the trapping processes and the TL efficiency. The results show that both undoped and doped YAG nanocrystalline phosphor present good TL efficiency as well as good dose response which qualify them as a potential UV-, X- and ?-ray dosimeter. A linear response under X-ray irradiation is observed for low doses level in the 0.02-1.02 ?Gy range and for relatively high doses level of ?-ray irradiation in the range from 10 to 600 Gy. " 2006 Elsevier B.V. All rights reserved.
|Appears in Collections:||Producción científica UdeG|
Files in This Item:
There are no files associated with this item.
Items in RIUdeG are protected by copyright, with all rights reserved, unless otherwise indicated.