用于精确测量中子俘获反应截面的GTAF装置,由40块BaF_2探测器组成,使用FlashADC对探测器的脉冲波形进行数字化采集。图1为BaF_2探测器得到的各信号的脉冲波形,其中~(137)Cs和~(60)Co的γ射线是有效信号,电子学噪声和α粒子是需剔除的本底。波形分析的主要内容是剔除GTAF探测器的本底,包括BaF_2晶体固有的α本底和电子学噪 The GTAF device for accurate measurement of the neutron capture reaction cross-section consisted of 40 BaF_2 detectors, digitally acquiring the detector’s pulse waveform using FlashADC. Fig. 1 shows the pulse waveforms of each signal obtained by the BaF_2 detector. The γ rays of ~ (137) Cs and ~ (60) Co are effective signals, and the electronic noise and α particles are the background to be rejected. The main content of the waveform analysis is to remove the background of the GTAF detector, including the inherent alpha background and electronic noise of the BaF 2 crystal