ABSTRACT

This paper emphasizes on the correction of a misconception among the students about the presence of negative dead time values determined by using a two-source method. To specify the importance of this work, weak sources have been designed specifically so that broad distribution of dead time values can be obtained including 30–40% of the negative values. During the measurements, students usually eliminate the measured negative dead time data intuitively, which leads to an inaccurate average detector dead time. In this work, together with the experimental results from the two-source method, we also performed Monte Carlo simulation. Thus, we correlated the statistical average distribution of dead time and proved that negative value of dead time exists when the weak sources are applied. Furthermore, these negative dead time values play a crucial role in determining the accurate dead time. Thus, this work will serve to be an excellent model for the students to learn about the scientific discipline in handling the experimental data correctly and the importance of error propagation in counting statistics.

摘要

本文强调纠正学生对使用双源方法确定的负死区时间值存在的误解。为了说明这项工作的重要性，专门设计了弱源，以便可以获得广泛分布的死区时间值，包括 30-40% 的负值。在测量过程中，学生通常会直观地将测量到的负死区时间数据剔除，从而导致检测器平均死区时间不准确。在这项工作中，结合双源方法的实验结果，我们还进行了蒙特卡罗模拟。因此，我们关联了死区时间的统计平均分布，并证明了应用弱源时死区时间的负值存在。此外，这些负的死区时间值在确定准确的死区时间方面起着至关重要的作用。因此，这项工作将成为学生学习正确处理实验数据的科学学科以及错误传播在计数统计中的重要性的绝佳模型。