Patent ID: 7664225

Claim:
A device for fast determination or online determination of components of a substance in a two-component or multi-component system, the components including elements of different atomic numbers, said device comprising: at least one radiation source and at least one radiation detector arranged in a backscattering path, and; at least one evaluation unit that is respectively connected to the radiation detector; wherein the radiation source is a gamma-radiation source with an energy of 10-30 keV or an X-ray tube, operating with an acceleration voltage between 10 kV and 50 kV, and including an anode of Cu, Mo, Rh or W; the radiation detector is sensitive in an energy range of 1 keV to 30 keV, and has a resolution of at least 250 eV; and the evaluation unit analyzes a spectrum of a radiation that is backscattered elastically or inelastically by the substance, and the emitted radiation in an energy range between 1 keV and 30 keV.