Multiphase Transition toward Colorless Bismuth–Germanate Scintillating Glass and Fiber for Radiation Detection,ACS Applied Materials & Interfaces

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Multiphase Transition toward Colorless Bismuth–Germanate Scintillating Glass and Fiber for Radiation Detection
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-31 , DOI: 10.1021/acsami.0c02589
Zhenguo Shi ₁ , Shichao Lv ₁ , Guowu Tang ₁ , Junzhou Tang ₁ , Licheng Jiang ₁ , Qi Qian ₁ , Shifeng Zhou ₁ , Zhongmin Yang _{1,

2}

Affiliation

The applications of scintillating fiber in high-resolution medical imaging, remote radiation monitoring, and microbeam radiation therapy have raised a growing demand of bismuth–germanate (BGO) glass fiber. However, the task of construction of colorless BGO glass fiber has been met with limited success. Here, we present a renewable process that can help to achieve BGO scintillating fiber, based on glass relaxation and crystallization mediated dissolution of unexpected Bi center. The experimental results indicate that the strategy can improve the optical transmittance up to more than 73.17% at 483 nm, which is ∼6.28 times higher than that of the conventional material. Importantly, the obtained nanostructured BGO exhibits bright visible luminescence under excitation with X-ray. Furthermore, it can host various types of rare-earth dopants, and the radiation-induced luminescence can be tuned in a wide waveband region from visible to infrared waveband. In addition, colorless BGO fiber with bright emission is also successfully constructed, and the radiation probing test demonstrates the achievement of ∼19.48 times improvement in the detection sensitivity. Our results highlight the approach based on the dynamic glass relaxation may provide new opportunities for construction of scintillating glass fiber and compact radiation fiber detector.

中文翻译：

朝向无色铋锗酸盐闪烁玻璃和光纤的多相转变，用于辐射检测

闪烁纤维在高分辨率医学成像，远程辐射监测和微束放射治疗中的应用引起了锗酸铋（BGO）玻璃纤维的需求不断增长。然而，无色BGO玻璃纤维的构造任务已经取得了有限的成功。在这里，我们提出了一种可再生工艺，该工艺可基于玻璃弛豫和结晶介导的意想不到的Bi中心的溶解，帮助实现BGO闪烁纤维。实验结果表明，该策略可以提高483nm处的透光率，达到73.17％以上，是常规材料的6.28倍。重要的是，获得的纳米结构的BGO在X射线激发下显示出明亮的可见光。此外，它可以容纳各种类型的稀土掺杂剂，并且可以在从可见光到红外波段的宽波段范围内调节辐射致发光。此外，还成功地构建了无色BGO纤维，它发出了明亮的光，辐射探测实验表明，其检测灵敏度提高了约19.48倍。我们的结果强调了基于动态玻璃弛豫的方法可能为构造闪烁玻璃纤维和紧凑型辐射纤维探测器提供新的机会。

更新日期：2020-04-01

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