Thermoluminescent and optical absorption properties of neodymium doped yttrium aluminoborate and yttrium calcium borate glasses

Autor(es)

Yoshimura, E. M. ^[1] ; Santos, C. N. ^{[2, 3, 4]} ; Ibanez, A. ^{[2, 4]} ; Hernandes, A. C. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Fis Nucl, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Univ Grenoble 1, F-38042 Grenoble 9 - France

^[3] Univ Sao Paulo, Grp Crescimento Cristais & Mat Ceram, Inst Fis, BR-13560970 Sao Carlos, SP - Brazil

^[4] CNRS, Inst Neels, F-38042 Grenoble - France

• Tipo de documento: Artigo Científico
• Fonte: Optical Materials; v. 31, n. 6, p. 795-799, APR 2009.
• Citações Web of Science: 27

Resumo

Neodymium doped yttrium aluminoborate and yttrium calcium borate glasses were prepared by the conventional melting-quenching technique with neodymium concentration varying from 0.10 to 1.0 mol%. The obtained glasses present a wide transparency in the UV-visible region (till 240 nm). The thermoluminescent (TL) emission of beta-irradiated samples was measured, showing a broad peak at similar to 240 degrees C with intensities related to the Nd(3+) content, for both glasses. Calcium borate glass samples are about one order of magnitude less luminescent than the aluminoborate glasses. Probably the presence of Ca(2+), instead of Al(3+) and Y(3+) in the matrix, inhibits the production of the intrinsic hole centers. connected to boron and oxygen, known in the literature to act as luminescent centers in TL emission of borate glasses. We suggest that Nd(3+) ions act as electron trapping centers in both glass matrices, as they modify the temperature of emission and the light intensity. Also, the Nd:YAIB glass can be used as a dosimeter in various applications, including radiotherapy. but the sensitivity of this material to neutron should be checked. (C) 2008 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 04/12059-0 - Dosimetria com luminescência opticamente estimulada (OSL): caracterização de materiais para medidas ambientais e em radiodiagnóstico e desenvolvimento de leitor OSL portátil
• Beneficiário: Elisabeth Mateus Yoshimura
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 04/00093-0 - Síntese e caracterização de componentes micro-ópticos bifuncionais e filmes amorfos dos sistemas RE: Y2O3 - Al2O3 - B2O3 e RE: Y2O3 - CaO - B2O3 (RE = Nd, Er, Sm) para aplicação em micro-óptica e luminescência
• Beneficiário: Cristiane Nascimento Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado