Techniques for inelastic x-ray scattering with {mu}eV resolution.

Abstract

A new spectroscopic technique is introduced that allows tuning of a μeV‐wide beam of synchrotron radiation over a range of a few meV. It relies on nuclear resonant scattering that is subject to the Doppler effect in high speed rotary motion. Two mechanisms are discussed how to extract the resonantly scattered radiation out of the broad band of synchrotron radiation: (a) grazing incidence reflection from a rotating disk in combination with a polarization filtering technique and (b) deflection of resonantly scattered radition via the recently discovered Nuclear Lighthouse Effect. Implications for inelastic X‐ray scattering and elastic nuclear resonant scattering are discussed.