Using the photo-induced L_3 resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft X-ray sources

2026-07-21T13:18:46Z https://data.helmholtz-berlin.de/oaipmh/request

oai:data.helmholtz-berlin.de:datapub/7 2022-08-26T12:53:14Z pub

4.5 HZB 10.5442/ND000007 Jana, Somnath Somnath Jana 0000-0001-8655-0545 Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin, Germany Muralidhar, Shreyas Shreyas Muralidhar 0000-0002-1045-6111 Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden Åkerman, Johan Johan Åkerman 0000-0002-3513-6608 Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden Schüßler-Langeheine, Christian Christian Schüßler-Langeheine 0000-0002-4553-9726 Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin, Germany Pontius, Niko Niko Pontius 0000-0002-5658-1751 Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin, Germany Using the photo-induced L_3 resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft X-ray sources HZB Data Service 2021 X-ray-Optical Cross-Correlation Ultrafast Spectroscopy X-ray Absorption Spectroscopy 2021-07-07 Dataset 10.1063/4.0000108 10.1107/S1600577514012247 14.11 MiB text/x-spec application/pdf Creative Commons Zero v1.0 Universal We study the optical-pump induced ultrafast transient change of the X-ray absorption at the L_3 absorption resonances of the transition metals Ni and Fe in Fe_{0.5}Ni_{0.5} alloy. We find the effect for both elements to occur simultaneously on a femtosecond timescale. This effect may hence be used as a handy cross-correlation scheme providing a time-zero reference for ultrafast optical-pump soft X-ray-probe measurement. The method benefits from a relatively simple experimental setup as the sample itself acts as time-reference tool. In particular, this technique works with low flux ultrafast soft X-ray sources. The measurements are compared to the cross-correlation method introduced in an earlier publication. The data is a spec-file containing the scans that have been used for the analysis. See the accompanying README.pdf file for details. German Research Foundation https://doi.org/10.13039/501100001659 328545488 10.1063/4.0000108 Using the photoinduced L_3 resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft x-ray sources 10.1107/S1600577514012247 FemtoSpeX: a versatile optical pump-soft X-ray probe facility with 100 fs X-ray pulses of variable polarization