Abstract In this paper we introduce a new time-independent Extended C-sigma approach for the analysis of Laser Induced Breakdown Spectroscopy (LIBS) spectra and apply it to the determination of the Stark broadening coefficient of several neutral and ionic emission lines of tantalum. The method proposed is based on the recently introduced Extended C-sigma procedure and exploits the spectral information extracted from LIBS spectra acquired at different delay times after the laser pulse for building a time-independent Extended C-sigma curve. The method intrinsically includes in the calculation the effects of self-absorption, which is one of the main sources of indetermination in LIBS applications to the determination of spectroscopic fundamental parameters, such as transition probabilities and Stark broadening coefficients.

中文翻译：

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用时间无关扩展C-sigma方法确定钽发射线的斯塔克展宽系数

摘要 在本文中，我们介绍了一种用于分析激光诱导击穿光谱 (LIBS) 光谱的新的时间无关扩展 C-sigma 方法，并将其应用于测定钽的几个中性和离子发射线的斯塔克展宽系数。所提出的方法基于最近引入的扩展 C-sigma 程序，并利用从激光脉冲后不同延迟时间获取的 LIBS 光谱中提取的光谱信息来构建与时间无关的扩展 C-sigma 曲线。该方法在计算中本质上包括自吸收的影响，这是 LIBS 应用中不确定性的主要来源之一，用于确定光谱基本参数，例如跃迁概率和斯塔克展宽系数。