Institut für Ionenphysik und Angewandte Physik und Research Platform Advanced Materials, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria.
J Chem Phys. 2011 Jul 28;135(4):044309. doi: 10.1063/1.3610388.
The submersion of sodium clusters beyond a critical size in helium nanodroplets, which has recently been predicted on theoretical grounds, is demonstrated for the first time. Confirmation of a clear transition from a surface location, which occurs for alkali atoms and small clusters, to full immersion for larger clusters, is provided by identifying the threshold electron energy required to initiate Na(n) cluster ionization. On the basis of these measurements, a lower limit for the cluster size required for submersion, n ≥ 21, has been determined. This finding is consistent with the recent theoretical prediction.
首次证实了最近从理论上预测的钠团簇在氦纳米液滴中超过临界尺寸的浸没。通过确定引发 Na(n)团簇电离所需的阈值电子能量，提供了从发生在碱金属原子和小团簇上的表面位置到完全浸没的明显转变的确认。基于这些测量，确定了浸没所需的团簇尺寸的下限，n≥21。这一发现与最近的理论预测一致。
