A zone-plate-based two-color spectrometer for indirect X-ray absorption spectroscopy

A zone-plate-based two-color spectrometer for indirect X-ray absorption spectroscopy. Döring, F., Risch, M., Rösner, B., Beye, M., Busse, P., Kubiček, K., Glaser, L., Miedema, P. S., Soltau, J., Raiser, D., Guzenko, V. A., Szabadics, L., Kochanneck, L., Baumung, M., Buck, J., Jooss, C., Techert, S., & David, C. Journal of Synchrotron Radiation, 26(4):1266–1271, Jul, 2019.

Paper doi abstract bibtex

X-ray absorption spectroscopy (XAS) is a powerful element-specific technique that allows the study of structural and chemical properties of matter. Often an indirect method is used to access the X-ray absorption (XA). This work demonstrates a new XAS implementation that is based on off-axis transmission Fresnel zone plates to obtain the XA spectrum of La${\sb 0.6}$Sr${\sb 0.4}$MnO${\sb 3}$ by analysis of three emission lines simultaneously at the detector, namely the O 2ıt p–1ıt s, Mn 3ıt s–2ıt p and Mn 3ıt d–2ıt p transitions. This scheme allows the simultaneous measurement of an integrated total fluorescence yield and the partial fluorescence yields (PFY) of the Mn 3ıt s–2ıt p and Mn 3ıt d–2ıt p transitions when scanning the Mn ıt L-edge. In addition to this, the reduction in O fluorescence provides another measure for absorption often referred to as the inverse partial fluorescence yield (IPFY). Among these different methods to measure XA, the Mn 3ıt s PFY and IPFY deviate the least from the true XA spectra due to the negligible influence of selection rules on the decay channel. Other advantages of this new scheme are the potential to strongly increase the efficiency and throughput compared with similar measurements using conventional gratings and to increase the signal-to-noise of the XA spectra as compared with a photodiode. The ability to record undistorted bulk XA spectra at high flux is crucial for future ıt in situ spectroscopy experiments on complex materials.

@article{Doring:ve5095,
author = "D{\"{o}}ring, Florian and Risch, Marcel and R{\"{o}}sner, Benedikt and Beye, Martin and Busse, Philipp and Kubi{\v{c}}ek, Katharina and Glaser, Leif and Miedema, Piter S. and Soltau, Jakob and Raiser, Dirk and Guzenko, Vitaliy A. and Szabadics, Lukas and Kochanneck, Leif and Baumung, Max and Buck, Jens and Jooss, Christian and Techert, Simone and David, Christian",
title = "{A zone-plate-based two-color spectrometer for indirect X-ray absorption spectroscopy}",
journal = "Journal of Synchrotron Radiation",
year = "2019",
volume = "26",
number = "4",
pages = "1266--1271",
month = "Jul",
doi = {10.1107/S1600577519003898},
url = {https://doi.org/10.1107/S1600577519003898},
abstract = {X-ray absorption spectroscopy (XAS) is a powerful element-specific technique that allows the study of structural and chemical properties of matter. Often an indirect method is used to access the X-ray absorption (XA). This work demonstrates a new XAS implementation that is based on off-axis transmission Fresnel zone plates to obtain the XA spectrum of La${\sb 0.6}$Sr${\sb 0.4}$MnO${\sb 3}$ by analysis of three emission lines simultaneously at the detector, namely the O 2{\it p}{--}1{\it s}, Mn 3{\it s}{--}2{\it p} and Mn 3{\it d}{--}2{\it p} transitions. This scheme allows the simultaneous measurement of an integrated total fluorescence yield and the partial fluorescence yields (PFY) of the Mn 3{\it s}{--}2{\it p} and Mn 3{\it d}{--}2{\it p} transitions when scanning the Mn {\it L}-edge. In addition to this, the reduction in O fluorescence provides another measure for absorption often referred to as the inverse partial fluorescence yield (IPFY). Among these different methods to measure XA, the Mn 3{\it s} PFY and IPFY deviate the least from the true XA spectra due to the negligible influence of selection rules on the decay channel. Other advantages of this new scheme are the potential to strongly increase the efficiency and throughput compared with similar measurements using conventional gratings and to increase the signal-to-noise of the XA spectra as compared with a photodiode. The ability to record undistorted bulk XA spectra at high flux is crucial for future {\it in situ} spectroscopy experiments on complex materials.},
keywords = {two-color X-ray absorption spectroscopy, zone plates, soft X-rays},
}

Downloads: 0