Unlocking the effect of Li and Ce ions on the thermoluminescence and optically stimulated luminescence signals of the MgB4O7 compound
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Magnesium tetraborate (MgB4O7) is an example of a material that has attracted the attention of researchers in the field of ionising radiation dosimetry. Several challenges are present in order to achieve considerable advances in luminescence dosimetry. The incorporation of efficient dopants in the host matrix has
been an experimentally useful but limited strategy. The lack of specific information about the introduced
defects as well as their connection with the trapping and recombination processes associated with light
emission may be quoted as challenging examples. Here, we demonstrate the influence of lithium incorporation on Optically Stimulated Luminescence (OSL)/Thermoluminescence (TL) signal modification/suppression of MgB4O7 by combining experimental and computational procedures. Li substitution into the
Mg site leads to a signal suppression due to the probable quenching of the Fs and Fs
+ centres in MgO and
the formation of O’’i
, drastically reducing the possibility of MgO anti-Schottky defect formation in
MgB4O7. When using Li-co-doped MgB4O7:Ce3+, the Li ions act as a charge balancer, facilitating the
entry of Ce ions into the interstitial pores and making possible a positive synergistic effect on the luminescence and dosimetric properties. These findings provide new insights into designing more efficient dosimeters by tuning dopants.
Como referenciar
BATISTA, JOAO V.B.; TROMBINI, HENRIQUE; OTSUKA, ANDRE; SILVEIRA, IURY S.; CALDAS, LINDA V.E.; SOUZA, ANTONIO O. de; SOUZA, ADELMO S.; SANTOS, JORGE L.O.; COELHO, VINICIUS; LIMA, HEVESON. Unlocking the effect of Li and Ce ions on the thermoluminescence and optically stimulated luminescence signals of the MgB4O7 compound. Dalton Transactions, v. 52, n. 19, p. 6407–6419, 2023. DOI: 10.1039/d3dt00485f. Disponível em: http://repositorio.ipen.br/handle/123456789/34166. Acesso em: 30 Dec 2025.
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.