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<p>Sm-doped Ca<sub>2</sub>P<sub>2</sub>O<sub>7</sub> was synthesized via the solid-state reaction method to explore its potential as a radiophotoluminescence (RPL) material. Upon X-ray irradiation, a new emission band attributed to Sm<sup>2+</sup> is observed, and its intensity increases monotonically with the absorbed dose. The resulting dose response relationship exhibits a dynamic range of 0.5–20 Gy and follows the equation: <i>Response</i> = 141 <i>Dose</i><sup>0.8</sup>. The RPL signal decays by approximately 10% within 20 min after irradiation. Furthermore, the Sm<sup>2+</sup> center formed by X-ray irradiation can be effectively erased by heat treatment at 700 °C.</p>

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Characterization of radiophotoluminescence properties of Sm-doped Ca2P2O7

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Miho Aoki,
  • Hidehito Nanto,
  • Go Okada

摘要

Sm-doped Ca2P2O7 was synthesized via the solid-state reaction method to explore its potential as a radiophotoluminescence (RPL) material. Upon X-ray irradiation, a new emission band attributed to Sm2+ is observed, and its intensity increases monotonically with the absorbed dose. The resulting dose response relationship exhibits a dynamic range of 0.5–20 Gy and follows the equation: Response = 141 Dose0.8. The RPL signal decays by approximately 10% within 20 min after irradiation. Furthermore, the Sm2+ center formed by X-ray irradiation can be effectively erased by heat treatment at 700 °C.