Very high resolution photoelectron spectroscopy on deeply cold gold cluster anions

深冷金簇阴离子的极高分辨率光电子能谱

• 批准号: 503197602
• 负责人: Professor Dr. Bernd von Issendorff
• 金额: --
• 依托单位: Arbeitsgemeinschaft Clusterphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/503197602?language=en
• 关键词: Very; resolution; photoelectron; spectroscopy; deeply

Gold clusters are attracting significant interest due to their often exotic properties, which are closely linked to the strong influence of relativistic effects in their interatomic bonding. Photoelectron spectroscopy on gold cluster anions has helped to unveil many interesting properties of smaller clusters, but for clusters with more than 20 atoms was hampered both by finite resolution and the difficulties theory had to simulate photoelectron spectra reliably. Very recently a breakthrough has been achieved in the theoretical treatment of gold clusters; now much better resolved photoelectron spectra are needed to fully exploit this progress. We have developed a new version of a magnetic bottle spectrometer with a significantly improved resolution, which in combination with cryogenic cooling of the clusters could be used to obtain spectra of unprecedented quality. We propose to perform a comprehensive study of size-selected gold cluster anions using isomer-sensitive methods, which in combination with the new theoretical results will lead to a much better understanding of the geometric and electronic structure of these clusters, as well as of dynamic aspects of the photoemission like hole lifetimes.

金团簇由于其奇异的性质而引起了人们极大的兴趣，这些性质与相对论效应在其原子间成键中的强烈影响密切相关。金团簇阴离子的光电子能谱有助于揭示更小团簇的许多有趣性质，但对于超过20个原子的团簇，由于有限的分辨率和理论模拟光电子能谱的困难而受到阻碍。最近在金团簇的理论处理方面取得了突破，现在需要更好地分辨光电子能谱来充分利用这一进展。我们已经开发出一种新版本的磁瓶光谱仪，具有显着提高的分辨率，结合低温冷却的集群可以用来获得前所未有的质量的光谱。我们建议使用异构体敏感的方法，结合新的理论结果将导致更好地了解这些集群的几何和电子结构，以及动态方面的光电发射，如空穴寿命的大小选择的金簇阴离子进行全面的研究。