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Published online by Cambridge University Press: 06 March 2019
The origin of the background under the signal in the wavelength dispersive XRF has been investigated. The methods of minimizing the background are presented. The bremsstrahlung is eliminated by using a primary filter in front of the X-ray tube. The background generated by the X-ray detector is decreased with a pulse risetime and a pulse interval analyzer. For example, in the fixed uranium spectrometer channel a 500-fold improvement of the peak-to-background ratio was achieved.