Luminescência opticamente estimulada em pastilhas de quartzo utilizando iluminação azul e verde

Neilo Marcos Trindade; Isabela Alves Ferreira; Matheus  Cavalcanti dos Santos Nunes; Elisabeth Mateus Yoshimura; Makaiko Chithambo

doi:10.15392/2319-0612.2024.2568

Authors

Neilo Marcos Trindade Instituto de Física - Universidade de São Paulo
Isabela Alves Ferreira Instituto Federal de São Paulo
Matheus Cavalcanti dos Santos Nunes Universidade Estadual Paulista
Elisabeth Mateus Yoshimura Instituto de Física - Universidade de São Paulo
Makaiko Chithambo Rhodes University

DOI:

https://doi.org/10.15392/2319-0612.2024.2568

Keywords:

rose quartz , blue-OSL, green-OSL, dosimetry

Abstract

In this study, pellets fabricated from powdered rose quartz are investigated for their potential as ionizing radiation detectors, taking advantage of the abundant availability of quartz in the Earth's crust. For this purpose, optically stimulated luminescence (OSL) technique, using blue and green light stimulation, was used. The pellets were irradiated with a ⁹⁰Sr/⁹⁰Y beta source to doses from 80 to 550 mGy (dose rate = 0.08Gy/s). Analysis of the OSL decay curves showed a good fit with 3 exponential components (fast, medium, and slow). A linear dose-response relationship was observed within this interval of dose for both light stimulations. The repeatability of the OSL signal was found to be 3% for blue light and 2% for green light. Additionally, the fading experiment indicated that, after 1 hour, 41% and 35% of the OSL signal remains for blue and green stimulation, respectively. The results obtained highlight the promising usefulness of rose quartz-based pellets as effective detectors of ionizing radiation.

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Author Biography

Neilo Marcos Trindade, Instituto de Física - Universidade de São Paulo

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