The effect of ionizing radiation on the luminescence properties of Eu super(3+) and Sm super(3+) doped LaF sub(3) nanoparticles

• Published in: Physica status solidi. C Vol. 9; no. 12; pp. 2247 - 2250
• Main Authors: Gaedtke, Christin, Williams, Grant VM, Janssens, Stefaan, Raymond, Sebastiampillai G, Clarke, Dave J
• Format: Journal Article
• Language: English
• Published: 01.12.2012
• Subjects: Dosimetry; Energy transfer; Ionizing radiation; Luminescence; Nanoparticles; Rare earth metals; Solid state physics; X-rays
• ISSN: 1862-6351; 1610-1642
• DOI: 10.1002/pssc.201200260

Photoluminescence (PL), PL lifetime, and radioluminescence (RL) measurements were made on LaF sub(3) nanoparticles doped with Eu super(3+) or Sm super(3+). The radiative lifetimes decreased with increasing rare earth concentrations, which can be attributed to energy transfer to the surface of the nanoparticles followed by non-radiative recombination. The RL signal increases with increasing concentration for Eu super(3+) concentrations up to 20% Eu super(3+) but it saturates and disappears for >10% Sm super(3+). A dose-independent RL was observed up to 10 kGy during continual X-ray irradiation for Eu super(3+) and Sm super(3+) doped nanoparticles, which is advantageous for real time dosimetry applications ( copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)