High-resolution x-ray spectra measured using tantalum superconducting tunnel junctions
High-resolution x-ray spectra measured using tantalum superconducting tunnel junctions
复制标题
使用钽超导隧道结测量的高分辨率 X 射线光谱
DOI：
10.1063/1.121603
复制
发表时间：
1998
影响因子：
4
通讯作者：
D. Goldie
中科院分区：
文献类型：
--
作者：
P. Verhoeve;N. Rando;A. Peacock;A. V. Dordrecht;B. Taylor;D. Goldie
研究了100×100 μ m ~ 2钽基超导隧道结对5.9keV ~（55）Fe源X射线光子的光谱响应。在全光照下，Mn Kα线复合体的能量分辨率为56 eV，主要由探测器响应的空间不均匀性决定。当选择性地照射探测器中心一个直径为5-10 μm的光斑时，能量分辨率提高到22 eV，对应于Mn Kα1和Mn Kα2线的能量分辨率为15.7eV。这超过了预测的理论能量分辨率为7.3 eV的这种类型的设备，只有一个因素的10.2。
The spectral response of a 100×100 μm2 tantalum based superconducting tunnel junction to 5.9 keV x-ray photons from a 55Fe source has been studied. In full illumination the energy resolution for the Mn Kα line complex is 56 eV, dominated by spatial nonuniformity in the response of the detector. When illuminating selectively a 5–10 μm diam spot in the center of the detector, the energy resolution improves to 22 eV, corresponding to 15.7 eV for the individual Mn Kα1 and Mn Kα2 lines. This exceeds the predicted theoretical energy resolution of 7.3 eV for this type of device by only a factor of ∼2.