We outline a simple routine to correct for non-uniformities in the energy dispersion of a post-column electron energy-loss spectrometer for use in scanning transmission electron microscopy. We directly measure the dispersion and its variations by sweeping a spectral feature across the full camera to produce a calibration that can be used to linearize datasets post-acquisition, without the need for reference materials. The improvements are illustrated using core excitation electron energy-loss spectroscopy (EELS) spectra collected from NiO and diamond samples. The calibration is rapid and will be of use in all EELS analysis, particularly in assessments of the chemical states of materials via the chemical shift of core-loss excitations.

中文翻译：

---

校正 EELS 色散不均匀性以改进化学位移分析

我们概述了一个简单的程序来校正柱后电子能量损失光谱仪在扫描透射电子显微镜中使用的能量色散的不均匀性。我们通过在整个相机上扫描光谱特征来直接测量色散及其变化，以产生可用于在采集后对数据集进行线性化的校准，而无需参考材料。使用从 NiO 和金刚石样品收集的核心激发电子能量损失光谱 (EELS) 光谱说明了这些改进。校准是快速的，将用于所有 EELS 分析，特别是在通过磁芯损耗激发的化学位移评估材料的化学状态时。