Hv2‐concept breaks the photon‐count limit of RIXS instrumentation. (5th August 2020)

• Record Type: Journal Article
• Authors: Zhou, Ke-Jin; Matsuyama, Satoshi; Strocov, Vladimir N.
• Is Part Of: Journal of synchrotron radiation. Volume 27:Part 5(2020)
• Page Start: 1235
• Page End: 1239
• Publication Date: 2020-08-05
• Subjects: RIXS -- X‐ray spectroscopy -- hv2‐spectrometer -- core‐hole lifetime -- charge‐neutral excitation; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577520008607
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : RIXS spectra are invariant to their integration over incident‐photon energies within the core‐hole lifetime. With hv 2 spectrometers, the whole lifetime‐wide bandwidth of synchrotron radiation can be utilized without compromising the energy resolution of the RIXS spectra. Abstract : Upon progressive refinement of energy resolution, the conventional resonant inelastic X‐ray scattering (RIXS) instrumentation reaches the limit where the bandwidth of incident photons becomes insufficient to deliver an acceptable photon‐count rate. Here it is shown that RIXS spectra as a function of energy loss are essentially invariant to their integration over incident energies within the core‐hole lifetime. This fact permits RIXS instrumentation based on the hv 2 ‐concept to utilize incident synchrotron radiation over the whole core‐hole lifetime window without any compromise on the much finer energy‐loss resolution, thereby breaking the photon‐count limit.