Higher Ionization Energies from Sequential Vacuum-Ultraviolet Multiphoton Ionization of Size-Selected Silicon Cluster Cations
Higher Ionization Energies from Sequential Vacuum-Ultraviolet Multiphoton Ionization of Size-Selected Silicon Cluster Cations
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DOI：
10.1021/jp511928m
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发表时间：
2015-05-21
影响因子：
3.7
通讯作者：
Lau, J. Tobias
中科院分区：
文献类型：
--
作者：
Kasigkeit, Christian;Hirsch, Konstantin;Lau, J. Tobias
在低温离子阱中，通过连续真空-紫外多光子电离大小选择的簇离子，确定了6-92原子硅簇的第二到第五电离能和高电荷态的外观尺寸。较高的电离能可以用球形液滴模型中的电荷能很好地描述。与硅团簇的电子亲和和第一电离能相比，高电离能似乎在长形到球形转变时变化不那么突然。
The second to fifth ionization energies and the appearance sizes of the higher charge states of silicon clusters with 6-92 atoms are determined by sequential vacuum-ultraviolet multiphoton ionization of size-selected cluster ions in a cryogenic ion trap. The higher ionization energies are well described by the charging energy in a spherical droplet model. In contrast to the electron affinity and the first ionization energy of silicon clusters, the higher ionization energies seem to change less abruptly at the prolate-to-spherical Shape transition.