A laboratory five-crystal x-ray emission spectrometer in von Hámos geometry
Abstract
X-ray emission spectroscopy (XES) is a powerful, element-specific tool for probing chemical valence states and electronic structures. While XES has traditionally been limited to high-flux synchrotron facilities, the move toward laboratory-based XES is crucial for routine characterization and long-term in situ studies. We report the development of a laboratory-based five-crystal XES spectrometer based on the von Hámos geometry, using crystal analyzers with a bending radius of 500 mm. In contrast to scanning-based Rowland configurations, this energy-dispersive setup enables simultaneous data collection across the entire spectral range without mechanical scanning, thereby ensuring temporal consistency across the spectrum. A bending radius of 500 mm was selected for the crystal analyzers to optimize the trade-off between collection efficiency, energy resolution, and the spatial requirements of complex sample environments. The impact of source size and focal spot alignment on energy resolution was systematically evaluated. Kα spectra of various Cu and Fe compounds were collected using the Si(444) and Si(333) Bragg reflections, respectively. Deconvolution of the metallic Cu spectrum revealed an instrumental broadening of 1.03 eV. Furthermore, the Kα1 peak positions were extracted to demonstrate the sensitivity of our laboratory system to subtle changes in the chemical environment, as validated by a linear correlation between the Kα1 energy shifts and Bond Valence Sums. This…
Read the paper
Related studies
- The potential and limitations of neutrons, electrons and X-rays for atomic resolution microscopy of unstained biological molecules
- X-ray-Computed Tomography Contrast Agents
- Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques
- Single-crystal X-ray diffraction studies on structural transformations of porous coordination polymers
- Investigation of solid/vapor interfaces using ambient pressure X-ray photoelectron spectroscopy
- Resonant X-Ray Scattering Studies of Charge Order in Cuprates
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.