β衰变实验中电子对γ全吸收谱的影响

The Influence of Electrons on the γ Total Absorption Spectrum in β Decay Experiments

摘要: β-奥斯陆方法为研究高激发态下的放射性核素性质以及探究从铁到铀的元素核合成过程提供了一种重要的研究工具。本工作提出了一种新型数据处理技术，旨在消除β衰变电子对β-奥斯陆实验中的子核γ退激衰变探测的影响，从而准确地展开观测到的γ射线光谱。通过运用γ射线与衰变电子的综合探测器响应函数矩阵，将列主元消去法与逐步迭代反解法相结合，确定真实的入射γ光谱。通过模拟和反演计算，证实了所提出方法的可靠性与有效性。

Abstract: The β-Oslo experimental method provides an important investigative tool for examining the properties of radioactive nuclides in highly excited states and exploring the nucleosynthesis process for elements ranging from iron to uranium. This paper introduces a novel data processing technique designed to eliminate the impact of β-decay electrons on the detection of nuclear γ de-excitation within β-Oslo experiments, accurately unfolding the observed γ-ray spectra. Utilizing a comprehensive detector response function matrix for γ rays and decay electrons, this method combines column-pivotal elimination and iterative step-by-step inverse solution approaches to determine the true incident γ spectrum. The reliability and validity of the proposed method have been substantiated through extensive simulations and inverse calculations.