Autor(es)

Opoku, K. A. ; Trindade, N. M. ; Chithambo, M. L.

• Tipo de documento: Artigo Científico
• Fonte: Radiation Measurements; v. 187, p. 7-pg., 2025-09-01.

Resumo

We present linearly modulated optically stimulated luminescence (LM-OSL) of rose quartz. The luminescence was stimulated using 470 nm blue light. The time-dependent plot of the luminescence intensity shows two distinct peaks. Analysis of this LM-OSL curve by deconvolution shows that it consists of at least five components. A number of factors related to these components have been considered. In particular, the effect of beta dose on kinetic parameters such as the optical stimulation probability and the photoionisation cross-section are reported. The thermoluminescence (TL) glow curve measured at 1 degrees C/s after irradiation to 10 Gy shows a high intensity peak at 76 degrees C and weaker-intensity ones at 118, 192, 300 and 412 degrees C. The primary peak at 76 degrees C is affected by thermal quenching. The value of the activation energy for thermal quenching as evaluated using LM-OSL and TL are consistent suggesting a common recombination center for the LM-OSL and TL of the primary peak. (AU)

• Processo FAPESP: 18/05982-0 - P&D&I em metrologia das radiações na área da saúde
• Beneficiário: Linda Viola Ehlin Caldas
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/05915-3 - Caracterização de minerais para dosimetria luminescente das radiações ionizantes
• Beneficiário: Neilo Marcos Trindade
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 24/03006-4 - Luminescência Estimulada de Minerais Simuladores Marcianos e Lunares
• Beneficiário: Neilo Marcos Trindade
• Modalidade de apoio: Auxílio à Pesquisa - Regular