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Environmental-friendly alternatives to the commercial scintillator CdWO4, which contains the toxic element Cd, are highly desired. As potential candidates, in this work, the scintillation characteristics of Nb:YTaO4 transparent single-crystals grown from melt by the floating-zone technique are studied. It is found that the broad UV luminescence of YTaO4 can be turned into a broad visible one by the partial substitution of Ta with only 2% Nb. Therefore, Nb incorporation promotes a better spectral matching to Si-photodiode detectors while the high stopping power of YTaO4 is kept, being close to that of commercial CdWO4. The scintillation properties of pure YTaO4, with a light yield of 15900 ph/MeV and an afterglow of 0.008% after 40 ms, are comparable to those of CdWO4. The light yield weighed with a Si-photodiode reaches maximum values for 0.5 & 1% Nb:YTaO4 crystals. An improvement in optical properties is expected by the growth of higher quality crystals by a flux-technique in the future.

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• In Copyright
  

Keyword: Nb:YTaO4, Single crystals, Scintillator

Date published: 2024-11-27

Publisher: Royal Society of Chemistry

Journal:

• CRYSTENGCOMM (ISSN: 14668033) vol. 27 issue. 1 p. 81-89

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5179

First published URL: https://doi.org/10.1039/D4CE00848K

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Updated at: 2025-11-24 08:30:03 +0900

Published on MDR: 2025-11-24 08:22:18 +0900