Johann-type laboratory-scale X-ray absorption spectrometer with versatile detection modes

We present a low-cost laboratory X-ray absorption spectrometer that uses a conventional X-ray tube source and bent Johann-type crystal monochromators. The instrument is designed for XAS studies in the 4-20 keV range which covers most K edges of 3d transition metals and L edges of 5d transition metal...

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Bibliographic Details
Published in:arXiv.org 2019-03
Main Authors: Honkanen, Ari-Pekka, Ollikkala, Sami, Ahopelto, Taru, Kallio, Antti-Jussi, Blomberg, Merja, Huotari, Simo
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Actinides
Bragg angle
Bragg equation
Design modifications
Energy resolution
Fluorescence
Laboratories
Modular design
Monochromators
Transition metals
X ray absorption
X ray spectrometers
X ray tubes
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Summary:We present a low-cost laboratory X-ray absorption spectrometer that uses a conventional X-ray tube source and bent Johann-type crystal monochromators. The instrument is designed for XAS studies in the 4-20 keV range which covers most K edges of 3d transition metals and L edges of 5d transition metals and actinides. The energy resolution is typically in the range of 1-5 eV at 10 keV depending on the crystal analyser and the Bragg angle. Measurements can be performed in transmission, fluorescence, and imaging modes. Due to its simple and modular design, the spectrometer can be modified to accommodate additional equipment and complex sample environments required for e.g. in situ studies. A showcase of various applications is presented.
ISSN:2331-8422
DOI:10.48550/arxiv.1812.01075