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Optically-stimulated luminescence properties of Eu-doped Cs(Cl, Br) translucent ceramics
Optical Materials ( IF 3.9 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.optmat.2020.109660
Hiromi Kimura , Takumi Kato , Daisuke Nakauchi , Noriaki Kawaguchi , Takayuki Yanagida

Abstract We have developed Eu-doped Cs(Clx, Br1-x) (x = 0, 0.25, 0.5, 0.75, 1) translucent ceramics by the spark plasma sintering technique and evaluated their optical and optically-stimulated luminescence (OSL) properties. As the optical properties, the transmittances of all the samples were 20–60% in the visible range, and the absorption bands around 260 and 350 nm due to 4f-5d transitions of Eu2+ were confirmed. After X-ray irradiation, all the samples showed the new absorption band around 600–700 nm. When increasing x, the generated absorption peak position shifted to shorter wavelength. Regarding the OSL properties, all the samples showed a broad OSL emission peak around 440 nm, and the origin was 5d-4f transitions of Eu2+. The peak positions of the OSL stimulation spectra shifted to shorter wavelength with increasing x. The dose sensitivities using OSL were confirmed to be as low as 0.01 mGy in all the samples.

中文翻译:

Eu掺杂Cs(Cl, Br)半透明陶瓷的光激发发光特性

摘要 我们通过放电等离子体烧结技术开发了掺铕的 Cs(Clx, Br1-x) (x = 0, 0.25, 0.5, 0.75, 1) 半透明陶瓷,并评估了它们的光学和光学激发发光 (OSL) 特性。作为光学特性,所有样品在可见光范围内的透射率为 20-60%,并且确认了由于 Eu2+ 的 4f-5d 跃迁导致的 260 和 350 nm 附近的吸收带。X 射线照射后,所有样品均在 600-700 nm 附近显示出新的吸收带。当 x 增加时,产生的吸收峰位置向更短的波长移动。关于 OSL 特性,所有样品都在 440 nm 附近显示出较宽的 OSL 发射峰,起源于 Eu2+ 的 5d-4f 跃迁。OSL 刺激光谱的峰值位置随着 x 的增加而向更短的波长移动。
更新日期:2020-02-01
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