2πα and 2πβ experimental data set

Data acquisition methods: In this study, the detector employed was a large-area 2π multi-wire proportional counter, a product of the China Institute of Atomic Energy (CIAE). The detector operates at voltages of 2100 V for α sources and 2800 V for β sources. It boasts a counting response uniformity exceeding ±0.4%, an effective detection area of approximately 1400 cm2, short-term stability measurements surpassing 0.3% over 8 h, and long-term stability measurements surpassing 0.8% over a year. A schematic of the 2π multi-wire proportional counter system used in this study is shown in Figure 1. The counter utilized P-10 gas for counting, composed of 90% Ar and 10% CH4. The gas flow rate was consistently held at 20–60 mL/min during the detector's routine operation. All sources deployed in the experiments were calibrated, with their traces leading back to the 2πα and 2πβ surface emission rate standard devices at CIAE. To align the count rate recorded by the digital acquisition card with the plane sources' surface emission rate, the acquisition card's pulse amplitude trigger threshold was adjusted during the surface emission rate calibration experiments. For configuring the acquisition card, a fixed sampling length was determined based on the pulse's maximum width. A pertinent starting point for sampling was selected. Amplitude and time resolutions were fine-tuned to prevent signal saturation and to ensure comprehensive pulse signal capture across all plane source varieties. Each signal sample spanned 1048 ns, with a time step of 1 ns, and it was divided into 1048 equidistant components. This type of configurations implied that minimal saturation or signal pile-up was observed throughout data collection. Description of the two files: The "α-plane source data" is a set of vectors converted from the digital signals of two α-plane sources (238Pu and 241Am) and one β-plane source (204Tl) at 2100V. The "β-plane source data" is a set of vectors converted from the digital signals of two α-plane sources (204Tl and 90Sr) and one α-plane source (241Am) at 2100V. In both files, the values in the first 1048 columns are the height information of the pulse and the 1049th column is the classification number (1, 2, 3).数据采集方法：本研究采用的探测器为中国原子能科学研究院（China Institute of Atomic Energy, CIAE）生产的大面积2π多丝正比计数器。该探测器针对α源的工作电压为2100 V，针对β源的工作电压为2800 V。其计数响应均匀性优于±0.4%，有效探测面积约1400 cm²，8小时短期稳定性优于0.3%，为期一年的长期稳定性优于0.8%。本研究使用的2π多丝正比计数器系统示意图如图1所示。 本实验采用P-10气体作为计数气体，其成分为90%氩气（Ar）与10%甲烷（CH4）；探测器常规运行过程中，气体流量稳定维持在20~60 mL/min。 本实验所用全部放射源均经过校准，其量值可溯源至中国原子能科学研究院的2πα与2πβ表面发射率标准装置。为使数字采集卡记录的计数率与平面源的表面发射率相匹配，在表面发射率校准实验中调整了采集卡的脉冲幅度触发阈值。 采集卡配置方面，根据脉冲最大宽度确定固定采样长度，并选取合适的采样起始点。对幅度与时间分辨率进行微调，以避免信号饱和，确保可完整捕获所有平面源的脉冲信号。每个信号采样时长为1048 ns，时间步长为1 ns，被划分为1048个等距采样点。该配置使得整个数据采集过程中几乎未出现信号饱和与脉冲堆积现象。 数据集文件说明："α平面源数据"为2100 V工况下，2种α平面源（238Pu、241Am）与1种β平面源（204Tl）的数字信号转换得到的向量集。"β平面源数据"为2100 V工况下，2种α平面源（204Tl、90Sr）与1种α平面源（241Am）的数字信号转换得到的向量集。上述两个文件中，前1048列的数值为脉冲高度信息，第1049列为分类编号（1、2、3）。

搜集汇总

背景与挑战

背景概述

该数据集是一个关于α和β粒子表面发射率测量的实验数据集合，包含从多个放射性平面源（如238Pu、241Am、204Tl和90Sr）在特定电压下采集的脉冲形状数字信号。数据以向量形式存储，每个文件包含1048个脉冲高度数据点和一个分类编号，主要用于脉冲形状判别和人工神经网络算法的研究，属于核科学与技术领域。数据集总大小为313.72 MB，由两个文件组成，支持相关核测量技术的开发和分析。