Electronic excitations in the valence shell of Ne clusters were studied by fluorescence spectroscopy. The measured fluorescence excitation functions contain information about the nature and number of excitonic states and the mean cluster size of the produced size distribution. Mean cluster sizes were determined by comparing surface and bulk contributions using a multidimensional fitting algorithm, with good agreement to commonly used scaling laws. The influence of different size distributions, which were not considered in previous investigations, on homogeneous noble gas cluster jets is implemented in the proposed model. The present work is the first approach using fluorescence spectroscopy for the determination of the mean size of Ne cluster jets created by supersonic expansion.

中文翻译：

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通过位点特异性光激发的荧光检测确定平均簇大小。

通过荧光光谱研究了Ne簇的价壳中的电子激发。测得的荧光激发函数包含有关激子态的性质和数量以及产生的尺寸分布的平均簇尺寸的信息。平均簇大小是通过使用多维拟合算法比较表面和块体贡献来确定的，与常用的缩放定律有很好的一致性。所提出的模型实现了先前研究中未考虑的不同尺寸分布对均质稀有气体团簇射流的影响。目前的工作是使用荧光光谱法确定由超声速膨胀产生的Ne团簇射流的平均尺寸的第一种方法。