A digital pulse fitting method for the decay studies of short-lived nuclei
A digital pulse fitting method for the decay studies of short-lived nuclei
复制标题
短寿命原子核衰变研究的数字脉冲拟合方法
DOI：
10.1140/epja/i2019-12684-7
复制
发表时间：
2019
影响因子：
2.7
通讯作者：
Yang C L
中科院分区：
文献类型：
--
作者：
Yang H B;Gan Z G;Zhang Z Y;Zhang M M;Huang M H;Ma L;Yang C L
在反冲分离器上用光谱学方法研究短寿命核时，衰变事件往往发生在反冲衰变或母核衰变之后，因此常常会遇到堆积脉冲。数字采集系统现在允许记录堆积事件的波形，而不是像传统的模拟系统那样拒绝它们。因此，以适当的精度提取堆积事件中存储的能量和时间信息，对短寿命核的测量具有重要意义。本文提出了一种处理硅探测器堆积事件的脉冲形状拟合方法。该方法是在改进的解析函数的基础上发展起来的，用于描述波形的信号的形状。用40Ca +184W反应中产生的短寿命核的实验数据验证了该方法的有效性。
When studying short-lived nuclei viaspectroscopic methods at recoil separators, the decay events tend to happen immediately after the recoil implantations or the decays of parent nuclei and therefore pile-up pulses are often encountered. Digital acquisition systems now allow the recording of waveforms of pile-up events rather than rejecting them as in traditional analog systems. Therefore, the extraction of the energy and time information stored in pile-up events with suitable precision is of great significance to the measurements of short-lived nuclei. In this paper, a pulse shape fitting method for processing pile-up events from silicon detectors are proposed. The method is developed on the basis of an improved analytical function for describing the shapes of preamplifier signals. The validity of the method is demonstrated by the experimental data of some short-lived nuclei produced in the reaction40Ca +184W.