Frontiers | Unfolding experimental distortions in beta spectrometry

IF 1.9 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Gaël Craveiro, Sylvain Leblond, Xavier Mougeot, Matthieu Vivier
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引用次数: 0

Abstract

The distortions of measured beta spectra are addressed by means of unfolding algorithms. Two different approaches, the Maximum-Likelihood Expectation-Maximization and the Tikhonov regularization, are tested on various simulated spectra, for which the initial spectrum to retrieve is known, and on a 99Tc spectrum measured with our dedicated setup. Statistical uncertainties of distorted measured spectra are propagated by determining the covariance matrices. Both algorithms provide satisfactory results but Tikhonov performs overall better for most of the studied radionuclides. Highlight is made on the necessity to employ at least two independent methods to ensure the accuracy of the unfolded spectra and to estimate the internal bias of each algorithm.
前沿 | 揭开贝塔光谱仪中的实验畸变
通过展开算法解决了测量到的β光谱失真问题。最大似然期望最大化和提霍诺夫正则化这两种不同的方法在各种已知初始光谱的模拟光谱上进行了测试,并在利用我们的专用装置测量的 99Tc 光谱上进行了测试。通过确定协方差矩阵来传播扭曲测量光谱的统计不确定性。这两种算法都能提供令人满意的结果,但对于所研究的大多数放射性核素而言,Tikhonov 算法的总体性能更好。突出强调了至少采用两种独立方法的必要性,以确保展开光谱的准确性,并估计每种算法的内部偏差。
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来源期刊
Frontiers in Physics
Frontiers in Physics Mathematics-Mathematical Physics
CiteScore
4.50
自引率
6.50%
发文量
1215
审稿时长
12 weeks
期刊介绍: Frontiers in Physics publishes rigorously peer-reviewed research across the entire field, from experimental, to computational and theoretical physics. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, engineers and the public worldwide.
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