Methodology for the characterisation of characteristic spectral profiles, applied to chromium Kβ

Abstract

The investigation of tests of quantum electrodynamics in the X-ray regime down to 2-20 parts per million (ppm) amplifies the need for improved characterisation of asymmetric reference sources and energies in this regime. While several transition metal characteristic energies have been defined, most are not referenced to accurate profiles or robust links to the metre via X-ray optical interferometry. Lower intensity Kβ transitions have relatively poor accuracy - we ask how to determine Kβ transitions to an accuracy approaching those of Kα transitions. Instrumental broadening normally encountered in X-ray experiments shifts the features of profiles used for calibration, such as peak energy, by..