Scintillation efficiency parameters of Eu3+, Tb3+ and Pr3+-doped GdAlO3, LuAlO3 and (Gd,Lu)AlO3 materials

• Grant number: 08/07599-7
• Support type: Scholarships in Brazil - Master
• Effective date (Start): March 01, 2009
• Effective date (End): February 28, 2011
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal researcher: Marian Rosaly Davolos
• Grantee: Higor Henrique de Souza Oliveira
• Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

Scintillators materials are compounds that can efficiently convert high-energy photons, as X-ray or ³-ray (or any kind of ionizing radiations), in UV and visible radiations. The Eu3+, Tb3+ and Pr3+-doped GdAlO3 and LuAlO3 are promising scintillators materials. Moreover, a mixed host (Gd,Lu)AlO3 is of interest because it combines density and x-ray absorptivity properties of Lu3+ with energy transfer capacity from Gd3+ to activators, resulting in more efficient scintillators. The aim of this project is the preparation of Eu3+, Tb3+ and Pr3+-doped GdAlO3, LuAlO3 and (Gd,Lu)AlO3 scintillators materials by polymeric precursors method (Pechini method) and the study of its structural and spectroscopic properties with the firing temperature, Gd:Lu proportion, dopant amount and sample conformation (powder or films). Furthermore, it will be carried out a systematic study of the spectroscopic parameters under x-ray excited optical luminescence (XEOL), for the determination of scintillation efficiency parameters, radiation damage (formation of defects and its influence in the scintillation process) and the temperature dependence of luminescence and scintillation. XEOL measurements are important tools in the characterization and understanding of energy transfer and luminescence mechanism, likewise the acquisition of information about quantum confinement, electronic defects, and determination of local structure of activators in luminescent materials.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MARCO AURÉLIO CEBIM; HIGOR HENRIQUE DE SOUZA OLIVEIRA; NILSO BARELLI; MARIAN ROSALY DAVOLOS. Sistema para realização de medidas de luminescência com excitação por Raios X. Química Nova, v. 34, n. 6, p. 1057-1062, 2011.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

OLIVEIRA, Higor Henrique de Souza. Propriedades e mecanismos de cintilação dos materiais 'GD''AL''O IND.3' e ('GD''LU')'AL''O IND.3' dopados com 'EU POT. 3+', 'TB POT. 3+' e 'PR POT. 3+'. 2011. 101 f. Master's Dissertation - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Quimica. Araraquara.