Abstract
Nuclear signal will pile up seriously at the condition of high counting rate when using semiconductor detectors because of its high resolution and wide output signal. In order to solve the problem. Dual-exponential trapezoidal shaping algorithm with fixed pulse width discrimination is used to eliminate partial pile-up pulses at first. Then this paper proposes characteristic peak probability estimation formula based on the calculation of characteristic peaks area and pulse shaping time. And then systems based on High Purity Germanium (HPGe) detector, high performance Silicon Drift Detector (fast SDD) and NaI(Tl) detector are chosen are built, experiment results show that the probability estimation formula is suitable for system with high detection efficiency and less counting loss.
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