BaF2闪烁体探测器信号数字化方法研究

应用数字化方法对BaF₂闪烁体探测器脉冲信号进行了研究，信号的测量通过FADC和计算机系统实现，并对所采集的脉冲波形进行了离线分析。通过计算脉冲波形的面积提取了射线的能量信息，重建了能谱，并与传统电子学模拟信号测量方法得到的能谱进行了比较；应用过阈定时方法提取了脉冲的时间信息，测量并给出了4πBaF₂探测器系统的时间分布谱；应用脉冲形状甄别法对α粒子和γ射线进行了鉴别研究，根据脉冲信号快/慢成分比的差别清楚地将α粒子从γ射线中鉴别开来。本工作为在γ全吸收型4πBaF₂探测器系统中应用FADC进行多通道、多参数、大数据量数字化数据获取积累了经验。

Digital Method on Signals of BaF2 Scintillator Detectors

Anode signals of the BaF₂ detectors were acquired using the Flash ADC combined with the computer system. The leading edge time distribution of the wave forms and the energy spectra of ¹³⁷Cs and ⁶⁰Co sources were obtained by off-line data analysis. α particles and γ rays were identified simply by the pulse shape discrimination. The energy resolutions of the spectra of the digital method are as equal as that of the traditional methods.