Feasibility of Laboratory-Based EXAFS Spectroscopy with Cryogenic Detectors.

Feasibility of Laboratory-Based EXAFS Spectroscopy with Cryogenic Detectors.
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DOI:
10.1007/s10909-020-02474-7
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发表时间:
2020-09
影响因子:
2
通讯作者:
Cantor R
Cantor R
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
George SJ;Carpenter MH;Friedrich S;Cantor R

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扩展X射线吸收精细结构(EXAFS)光谱是一种提供有关分子结构的特定元素信息的强大技术。能够测量透射谱的实验室EXAFS光谱仪的开发将是一个重大进步,因为这项技术目前只在同步辐射光源上可用。在这里,我们探索低温探测器作为实验室传输EXAFS仪器的能量解析部件的潜力。我们检查了良好的EXAFS光谱所需的能量分辨率、计数速率和探测器稳定性,并将其与低温探测器和传统X射线光学的特性进行了比较。我们发现超导隧道结(STJ)探测器非常适合这种应用。
Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy is a powerful technique that gives element-specific information about the structure of molecules. The development of a laboratory EXAFS spectrometer capable of measuring transmission spectra would be a significant advance as the technique is currently only available at synchrotron radiation lightsources. Here, we explore the potential of cryogenic detectors as the energy resolving component of a laboratory transmission EXAFS instrument. We examine the energy resolution, count-rate, and detector stability needed for good EXAFS spectra and compare these to the properties of cryogenic detectors and conventional X-ray optics. We find that superconducting tunnel junction (STJ) detectors are well-suited for this application.
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