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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Determination of the LiI 4d-4f energy separation using active spectroscopy
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Determination of the LiI 4d-4f energy separation using active spectroscopy

机译：有源光谱法测定LiI 4d-4f能量分离

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摘要

An accurate knowledge of the Li I 4d-4f energy separation is essential for the determination of electric fields, as is pursued using several modern diagnostic techniques. However, there is a rather large spread in the values of this quantity in the available data sources. We have measured the Li I 4d-4f energy separation using a technique that combines laser-induced-fluorescence with the utilization of collisional excitations. The plasma used for these measurements is laser-produced, which allows for selection of an electron-density range for which line shifts due to the plasma microfields are sufficiently small. An observation of the forbidden 2p-4f line provides the information on the microfields that allows for. accounting for the Stark-shifts and evaluating the 4d-4f energy separation in the field-free limit. A comparison of the measured value with a few previous measurements allows for resolving the uncertainties in this quantity.
机译：Li I 4d-4f能量分离的准确知识对于确定电场至关重要，这是使用几种现代诊断技术所追求的。但是，可用数据源中此数量的值存在相当大的差异。我们使用结合了激光诱导的荧光和碰撞激发的技术测量了Li I 4d-4f的能量分离。用于这些测量的等离子体是激光产生的，这允许选择由于等离子体微场而引起的线位移足够小的电子密度范围。对禁止的2p-4f谱线的观察提供了允许的微场信息。考虑到史塔克位移，并评估了无场极限下的4d-4f能量分离。将测量值与一些先前的测量值进行比较可以解决该数量的不确定性。

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