Umweg peak high resolution flat crystal x-ray spectrometer

Abstract

The construction of an X-ray wavelength dispersive flat crystal spectrometer using an n-beam diffraction peak is presented here. Such a spectrometer, although it is as simple as a flat crystal Bragg spectrometer, provides higher energy resolution than any other wavelength dispersive spectrometer available today. We demonstrate that by selecting the appropriate crystal and umweg peak for the under investigation wavelength area, the energy resolution ‡ ‡ The definition that we use for the energy resolution as E/d E is not uniquely accepted. Other authors use the term d E/ E and some of then use the Full Width at Half Maximum of a spectral line in eV, giving it as parameter for the energy, E, of the line. can exceed the value of 10 5.