The n-γ discrimination method for over-range waveforms in digitizer
Cui Yaoxuan1, Gao Zhichao1, Ma Fei2
1Chinese Academy of Sciences, Institute of Modern Physics, Lanzhou, China; University of Chinese Academy of Sciences, School of Nuclear Science and Technology, Beijing, China.
Abstract:
This paper aims to address the issue of neutron-gamma discrimination in over-range waveforms by proposing an innovative method based on Pulse Shape Discrimination (PSD) technology. Utilizing a DT5751 digitizer and an EJ-301 detector, signal waveforms from a252Cf neutron source were acquired and analyzed. The study delves into the specific impact of the over-range waveforms on the PSD spectrum and the resulting n-γ discrimination challenges. Over-range waveforms were classified based on the number of mesa points, with the starting positions of the long and short gates set at the end of the mesa region to achieve precise n-γ discrimination. After classification processing, the results show significant differences between neutron and gamma signals in the PSD spectra, effectively separating over-range neutron signals from gamma signals. This method provides an efficient and reliable approach to data processing in digitizers.
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