Radiophotoluminescence properties of Eu-doped Li2SrSiO4 for radiation detectors
To search for new radiophotoluminescence (RPL) materials, Eu-doped Li2SrSiO4 was synthesized by the solid-state reaction and then studied its RPL properties for radiation detector applications. All the samples were identified to be Li2SrSiO4 by X-ray diffraction. The as-prepared sample shows photolu...
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Veröffentlicht in: | Japanese Journal of Applied Physics 2024-01, Vol.63 (1), p.01SP14 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | To search for new radiophotoluminescence (RPL) materials, Eu-doped Li2SrSiO4 was synthesized by the solid-state reaction and then studied its RPL properties for radiation detector applications. All the samples were identified to be Li2SrSiO4 by X-ray diffraction. The as-prepared sample shows photoluminescence (PL) due to Eu3+ while an additional PL band appears due to a formation of Eu2+ after X-ray irradiation. This indicates that the Eu-doped Li2SrSiO4 has RPL properties. The sensitivity of RPL (or PL intensity of Eu2+) to X-ray dose is the highest when the Eu concentration is 0.1%, and the dynamic range is 5–10 000 mGy. In addition, the generated Eu2+ is so stable that only 5% of the signal degrades over 20 min after irradiation. The RPL signal notably decreases to about 30% of the initial value by heating at 500 °C for 100 s, and it is reproducible multiple times even after the heat treatment. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.35848/1347-4065/acf9b0 |