Energy dispersive spectrometers(EDS)vs wavelength dispersive spectrometers (WDS) WDS EDS Specimen Specimen ☑ Detector Multichannel Analyzer 28 Source Source Si(Li)Detector (a) (b) 20 Figure 6.6 Main components and dispersive spectra of:(a)WDS;and(b)EDS. (Figures reproduced from Leng) WDS uses single crystal diffraction to EDS uses photon detector to detect characteristic wavelengths separate characteristic x-ray photons emitted by specimen according to energy 1Energy dispersive spectrometers (EDS) vs wavelength dispersive spectrometers (WDS) 21