Energy Dispersive Diffraction E(keV) = 6.199 / (d_space * sin(theta_angle of Energy Dispersive detector))
Angular Dispersive Diffraction (simplification)
- Roughly single X-ray wavelength (e.g., Cu k-alpha = 1.54180Å)
- detector collects in 2-theta - measuring intensities of single wavelength (single energy) “diffracted” X-rays as a function of angle (2-theta)
- Bragg-Bretano / Debye Scherrer, etc laboratory systems (and neutron synchrotron)
Energy Dispersive Diffraction
- want intense, high-energy / multi-energy (multi-wavelength) “white” X-ray beam
- Energy sensitive detector at a “fixed angle” detects multi-energy (multi- wavelength) “diffracted” X-rays as a function of energy (in KeV)
- analogous to Time of Flight neutron diffraction (TOF)