Ultrahigh-Energy-Resolution Inelastic X-Ray Scattering
نویسنده
چکیده
Very-high-energy-resolution measurements using X-rays can be achieved by extreme backreflection (Bragg angle close to 90°) f rom perfect crystals. This technique allowed the development of the instrument INELAX for inelastic scattering experiments at the HARWI wiggler at DORIS, DESY Hamburg. Recently, a high energy resolution of 9 meV could be achieved, and the instrument proved to be an excellent tool to investigate collective excitations in condensed matter. Energy transfers from 10 meV to 12 eV and wave vectors up to about 10 Ä 1 are accessible.
منابع مشابه
Ultrahigh energy resolution focusing monochromator for inelastic x-ray scattering spectrometer.
A further development of a focusing monochromator concept for X-ray energy resolution of 0.1 meV and below is presented. Theoretical analysis of several optical layouts based on this concept was supported by numerical simulations performed in the "Synchrotron Radiation Workshop" software package using the physical-optics approach and careful modeling of partially-coherent synchrotron (undulator...
متن کامل4f delocalization in Gd: inelastic x-ray scattering at ultrahigh pressure.
We present resonant inelastic x-ray scattering and x-ray emission spectroscopy results on Gd metal to 113 GPa which suggest Kondo-like aspects in the delocalization of 4f electrons. Analysis of the resonant inelastic x-ray scattering data reveals a prolonged and continuous delocalization with volume throughout the entire pressure range, so that the volume-collapse transition at 59 GPa is only p...
متن کاملStimulated electronic x-ray Raman scattering.
We demonstrate strong stimulated inelastic x-ray scattering by resonantly exciting a dense gas target of neon with femtosecond, high-intensity x-ray pulses from an x-ray free-electron laser (XFEL). A small number of lower energy XFEL seed photons drive an avalanche of stimulated resonant inelastic x-ray scattering processes that amplify the Raman scattering signal by several orders of magnitude...
متن کاملNew developments in fabrication of high-energy-resolution analyzers for inelastic X-ray spectroscopy
In this work new improvements related to the fabrication of spherical bent analyzers for 1 meV energy-resolution inelastic X-ray scattering spectroscopy are presented. The new method includes the use of a two-dimensional bender to achieve the required radius of curvature for X-ray analyzers. The advantage of this method is the ability to monitor the focus during bending, which leads to higher-e...
متن کاملSearch for orbitons in LaMnO3, YTiO3 and KCuF3 using high-resolution inelastic x-ray scattering
Orbital excitations have been sought in three systems, LaMnO3, KCuF3 andYTiO3, using high-resolution inelastic x-ray scattering, with an energy resolution of 6 meV. Motivated by the recent Raman scattering result of Saitoh et al (2001 Nature 410 180), we measured the energy transfer spectra of LaMnO3 in the energy range up to 200 meV. We did not find any signal above background that could be as...
متن کامل