Unlocking the effect of Li and Ce ions on the thermoluminescence and optically stimulated luminescence signals of the MgB4O7 compound

dc.creatorBATISTA, JOAO V.B.
dc.creatorTROMBINI, HENRIQUE
dc.creatorOTSUKA, ANDRE
dc.creatorSILVEIRA, IURY S.
dc.creatorCALDAS, LINDA V.E.
dc.creatorSOUZA, ANTONIO O. de
dc.creatorSOUZA, ADELMO S.
dc.creatorSANTOS, JORGE L.O.
dc.creatorCOELHO, VINICIUS
dc.creatorLIMA, HEVESON
dc.date2023
dc.date2023-07-24T15:41:32Z
dc.date2023-07-24T15:41:32Z
dc.date.accessioned2023-09-28T14:26:26Z
dc.date.available2023-09-28T14:26:26Z
dc.identifier1477-9226
dc.identifierhttp://repositorio.ipen.br/handle/123456789/34166
dc.identifier19
dc.identifier52
dc.identifier10.1039/d3dt00485f
dc.identifier0000-0002-7362-2455
dc.identifier84.5
dc.identifier83.00
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9004374
dc.descriptionMagnesium 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.
dc.descriptionConselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)
dc.descriptionCNPq: 310586/2021- 6; 404784/2021-6; 305142/2021-6
dc.format6407???6419
dc.relationDalton Transactions
dc.rightsopenAccess
dc.titleUnlocking the effect of Li and Ce ions on the thermoluminescence and optically stimulated luminescence signals of the MgB4O7 compound
dc.typeArtigo de peri??dico
dc.coverageI


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