In the study of laser-induced plasmas it is customary to use the branching ratio method for assessing the conditions of optically thin plasma, which are important for the application of analytical methods such Calibration-Free LIBS. In this communication, we warn on the possibility that in some circumstances, the branching-ratio method might give results close to the one characterizing optically thin plasma conditions, even in the presence of a substantial self-absorption for the transitions considered.

中文翻译：

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表达式：用于评估激光诱导等离子体中的光学稀薄条件的支化比方法。

在激光诱导等离子体的研究中，习惯上使用支化比方法评估光学薄等离子体的条件，这对于分析方法（如无标定LIBS）的应用非常重要。在这种交流中，我们警告说，在某些情况下，即使在考虑到的跃迁存在相当大的自吸收的情况下，支化比方法也可能给出接近于表征光学稀薄等离子体条件的结果的可能性。