Micro-Columnar CsBr:Eu Storage Phosphor for High-Efficiency High Energy Photon Radiography Panels

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-09-24 DOI:10.1109/TNS.2024.3462148

Jun Wang;Matthew S. J. Marshall;Stuart Miller;Federico Moretti;Edith Bourret-Courchesne;Bipin Singh;Vivek Nagarkar

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引用次数: 0

Abstract

Eu-doped CsBr films (CsBr:Eu) exhibit excellent sensitivity for X-rays and are superior storage phosphors for high energy (MeV) photon radiography applications when coupled with thick copper or tungsten substrates. We report on the growth of micro-columnar CsBr:Eu films on copper substrates for megavolt (MV) X-ray imaging applications. Our films exhibit dense uniformly distributed micro-columns with an average diameter of

$\sim 10~\mu $

m and a sharp, needle-like top. The advantage of this micro-columnar structured film is that the light can be channeled through the narrow columns to improve both light transmission and spatial resolution. We also determined the optimal Eu concentration in CsBr for the best storage phosphor performance. Growth of uniformly thick, micro-columnar structured films up to 2 mm was achieved on

$2^{\prime \prime } \times 2^{\prime \prime }$

metallic substrates, which were then characterized by optically-stimulated luminescence (OSL) coupled with X-ray excitation. Furthermore, 5 mm thick film growth demonstrates the potential to scale up to even thicker films.

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用于高效高能光子射线照相术面板的微柱状 CsBr:Eu 储存荧光粉

掺杂 Eu 的铯硼薄膜（CsBr:Eu）对 X 射线具有极佳的灵敏度，与厚铜或钨基板结合使用时，是高能量（MeV）光子射线成像应用的优质存储荧光粉。我们报告了在铜基底上生长微柱状 CsBr:Eu 薄膜以应用于兆伏特 (MV) X 射线成像的情况。我们的薄膜呈现出致密均匀分布的微柱，其平均直径为 $\sim 10~\mu $ m，顶部呈尖锐的针状。这种微柱状结构薄膜的优势在于，光线可以通过狭窄的柱状结构导入，从而提高透光率和空间分辨率。我们还确定了 CsBr 中 Eu 的最佳浓度，以获得最佳的存储荧光粉性能。在 $2^{\prime \prime } 上生长出了厚度均匀的微柱状结构薄膜，最厚可达 2 毫米。\金属基底上生长出厚度达 2 毫米的均匀微柱状结构薄膜，然后用光激发发光（OSL）和 X 射线激发对其进行表征。此外，5 毫米厚的薄膜生长证明了将其扩展到更厚薄膜的潜力。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.