期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 117, 期 21, 页码 4394-4403出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp401424w
关键词
-
资金
- Deutsche Forschungsgemeinschaft
- Swiss National Science Foundation [200020_140396]
- Italian National Research Council (CNR) [MD.P03.026.001]
- Swiss National Science Foundation (SNF) [200020_140396] Funding Source: Swiss National Science Foundation (SNF)
Helium nanodroplets are widely used as a cold, weakly interacting matrix for spectroscopy of embedded species. In this work, we excite or ionize doped He droplets using synchrotron radiation and study the effect onto the dopant atoms depending on their location inside the droplets (rare gases) or outside at the droplet surface (alkali metals). Using photoelectron-photoion coincidence imaging spectroscopy at variable photon energies (20-25 eV), we compare the rates of charge-transfer to Penning ionization of the dopants in the two cases. The surprising finding is that alkali metals, in contrast to the rare gases, are efficiently Penning ionized upon excitation of the (n = 2)-bands of the host droplets. This indicates rapid migration of the excitation to the droplet surface, followed by relaxation, and eventually energy transfer to the alkali dopants.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据