High-Energy Inelastic-Scattering Beamline for Electron Momentum Density Study

Abstract

The advent of synchrotron radiation sources for well polarized and high-energy X-rays offers new opportunities for exploiting Compton scattering spectroscopy as a tool for investigating the electronic and magnetic structures of materials. Recent high-resolution Compton scattering experiments show the unique capability for the study of Fermiology-related issues and electron± electron correlation effects. Intense, high-energy and circularly polarized X-ray sources have improved magnetic Compton scattering spectroscopy from the point of statistical accuracy and momentum resolution. As a next advance, a high-energy inelastic scattering beamline dedicated to Compton scattering spectroscopies is being constructed at SPring-8. The light source is an elliptic multipole wiggler with a periodic length of 12 cm. The beamline includes two experimental stations: one is for high-resolution spectroscopy using 100±150 keV X-rays and the other is for magnetic Compton scattering experiments using circularly polarized 300 keV X-rays. The use of such highenergy X-rays makes it possible to carry out experiments ef®ciently on samples including heavier elements, such as high-T c superconductors and 4f and 5f magnetic materials.

Compton scattering imaging of a working battery using synchrotron high-energy X-rays

“…The experiment was performed at the BL08W beamline (Sakurai, 1998) at SPring-8. The X-ray source was an elliptical multipole wiggler operating in linear polarization mode (Maré chal et al, 1998).…”

Measurement of Two Solvation Regimes in Water-Ethanol Mixtures Using X-Ray Compton Scattering

“…Within the impulse approximation [28], the experimentally measured scattering cross section from an isotropic system is proportional to the Compton profile JðqÞ, which is determined by the ground-state electronic structure of the system. The experiment was performed at the BL08W beam line [29] in diameter and 10 mm in thickness along the incident x rays. The incident x-ray energy was 176.3 keV, and the scattering angle was 178.3 .…”

Electron momentum distribution of icosahedralCd84Yb16studied by Compton scattering

“…The Compton scattering experiment was carried out at BL08W, SPring-8. 20 The reader is referred to Hiraoka et al 21 for the details of the spectrometer. The energy of the incident x rays was 116 keV and the scattering angle was 165°.…”