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XRF SumPeak Processing
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=== Question === Is the sum peak effect truly fixed for a given system? I believe No. The reason is as you raise the count rate, increase tube current in our case, the probability of two pulses occurring to create a sum peak will increase as well, and our pulse processor has an "acceptance window" which is fixed in time. Therefore the intensity of the sum peak should grow faster than the increasing count rate. According to Stan, the equation N(sum) = 1/tau * N*N does take into account the fixed window. I still believe there maybe a problem with variable count rate, but I'm going to need to collect some data to prove this.
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