Evaluation of TL and OSL responses of recycled crab shell biowaste for radiation dosimetry
Carregando...
Data
Data de publicação
2023
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
INTERNATIONAL CONFERENCE ON SOLID STATE DOSIMETRY, 20th
Exportar
Resumo
The aim of this work was to evaluate the applicability of crab shell biowaste composites as
thermoluminescent (TL) and optically stimulated luminescent (OSL) detectors, since recent researchers
have found it to be a valuable intrinsic luminescent material. The waste of crabs shells (Ucides cordatus)
species was taken from a bar located at Atalaia beach in Aracaju city, Sergipe State, Brazil, and calcined at
800 °C for 2 h. The calcined crab shell powder was mixed with Teflon (2:1 mass ratio) and molded in
pellets of 6 mm diameter and 1 mm thickness. The pellets were sintered at 400 ºC for 1 h. The luminescent
and dosimetric characterization of the crab shell composites were performed using a TL/OSL Risø Reader,
model DA-20. The crab shell composites showed TL signals between 100°C and 400°C, with an intense
peak around 155°C and a less intense peak around 350°C. The first peak, although at a relative low
temperature, can be used as a dosimetric peak, due to its high intensity and acceptable fading (12% after 7
days). The OSL signal of the samples was very intense and with a very fast decay, which means that the
luminescent centers are easily optically stimulated by the reader blue LEDs. The emission spectra of the
samples showed a broad emission from 300 nm to 400 nm. All samples produced showed variation
coefficients for homogeneity and reproducibility below 9.5%, in addition to a linear response in the dose
range used (80 mGy to 1 Gy) and minimum detectable doses of the order of miligrays. Evaluating the
dosimetric applicability, the crab shell composites presented potential application as TL/OSL detectors in
processes that employ ionizing radiation such as beta particles, X and gamma rays.
Como referenciar
JUNOT, DANILO O.; SILVA, ANDERSON M.B.; REZENDE, YARA R.R.S.; SOUZA, DIVANIZIA N.; REZENDE, MARCOS V.S.; CALDAS, LINDA V.E. Evaluation of TL and OSL responses of recycled crab shell biowaste for radiation dosimetry. In: INTERNATIONAL CONFERENCE ON SOLID STATE DOSIMETRY, 20th, September 17-22, 2023, Viareggio, Italy. Abstract... Disponível em: https://repositorio.ipen.br/handle/123456789/47977. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.