RADIOLUMINESCENCE OF RARE-EARTH DOPED ALUMINUM OXIDE

M SANTIAGO; V BARROS; H KHOURY; P MOLINA; D ELIHIMAS

Ciudad de México

Congreso; XII INTERNATIONAL SYMPOSIUM XXII NATIONAL CONGRESS ON SOLID STATE DOSIMETRY; 2011

Carbon-doped aluminum oxide (Al2O3:C) is one of the most used radioluminescence (RL) materials for fiberoptic dosimetry due to its high efficiency (Andersen et al., 2010). However, it presents the drawback of emitting in the spectral region, where the spurious radioluminescence of fibers is also important. In this work, the radioluminescence response of rare-earth doped Al2O3 samples has been evaluated. The samples were prepared by mixing stoichiometric amounts of aluminum nitrate, urea and dopants with different amounts of terbium, samarium, cerium and thulium nitrates varying from 0 to 0.15 mol% (Barros et al., 2010). The influence of the different activators on the RL spectra has been investigated in order to determine the feasibility of using these compounds for RL fiberoptic dosimetry.