Luminescence properties of SiO2:Tb nanocrystals obtained via sol-gel route and its applicability to environmental ionizing radiation dosimetry

Autor(es)

Tudela, D. R. G. ^[1] ; Tatumi, S. H. ^{[1, 2]} ; Courrol, L. C. ^[3] ; Rocca, R. R. ^[2] ; Mittani, J. C. R. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Av Prof Luciano Gualberto 158, BR-05508010 Sao Paulo, SP - Brazil

^[2] Univ Fed Sao Paulo, Marine Sci Dept, R Dr Carvalho de Mendonca 144, BR-11070100 Santos, SP - Brazil

^[3] Univ Fed Sao Paulo, Phys Dept, R Dr Riedel 275, BR-09972270 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 207, p. 123-128, MAR 2019.
• Citações Web of Science: 0

Resumo

SiO2 was synthesized by sol-gel method and its luminescence investigated by emission spectroscopy and thermoluminescence (TL) techniques. A study on the influence of Tb on SiO2 was performed and a high increase of about 3000 times in TL intensity was observed. In addition, the presence of 4 bands in the UV (309, 336, 344 and 370 nm) and 6 bands (468, 521, 544, 585, 612 and 631 nm) in the visible region were detected. To verify its viability as an environmental radiation dosimeter, optically stimulated luminescence (OSL) measurements were made by irradiating the crystal with beta radiation, and linear growth was obtained in the region of low radiation doses, with minimum detectable dose of 0.4 mGy. (AU)

• Processo FAPESP: 09/02069-2 - Implantação e desenvolvimento da metodologia de datação de grão-único, por luminescência opticamente estimulada
• Beneficiário: Sonia Hatsue Tatumi
• Modalidade de apoio: Auxílio à Pesquisa - Regular