Fig. 1. Principle and prototype of TXRF spectrometer

Fig. 2. Fitting curve and transform results under different k values with straight-line shaper of a digital nuclear pulse

Fig. 3. Transform results of a series of digital nuclear pulse with different shaper

Fig. 4. Fitting results of rising edge of digital nuclear pulse transformed with straight-line shaper

Fig. 5. Relationship between amplitude fitting values by double exponential function and amplitude extraction values transformed with straight-line shaper of digital nuclear pulse

Fig. 6. Processing diagram of handling digital nuclear pulse in FPGA

Fig. 7. Measured spectrums of Fe film with TXRF spectrometer