Photoionization and imaging spectroscopy of rubidium atoms attached to helium nanodroplets
Photoionization and imaging spectroscopy of rubidium atoms attached to helium nanodroplets
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DOI：
10.1039/c2cp22749e
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发表时间：
2012-01-01
影响因子：
3.3
通讯作者：
Mudrich, M.
中科院分区：
文献类型：
--
作者：
Fechner, L.;Gruener, B.;Mudrich, M.
利用双光子电离光谱结合电子和离子成像技术研究了氦纳米液滴表面铷原子的高激发态。我们发现高产量的RbHe和RbHe 2激基复合物时，激发到4D和6P带，但不是在6S带，在雅阁与直接形成的激基复合物结合RbHe对电位。光离子光谱和角分布与RbHeN复合物的赝双原子模型吻合得很好。在激发态的排斥相互作用需要快速解离，然后电离的自由Rb原子以及RbHe和RbHe2激基复合物。
Highly excited states of rubidium (Rb) atoms attached to helium (He) nanodroplets are studied by two-photon ionization spectroscopy in combination with electron and ion imaging. We find high yields of RbHe and RbHe2 exciplexes when exciting to the 4D and 6P bands but not at the 6S band, in accord with a direct formation of exciplexes in binding RbHe pair potentials. Photoion spectra and angular distributions are in good agreement with a pseudodiatomic model for the RbHeN complex. Repulsive interactions in the excited states entail fast dissociation followed by ionization of free Rb atoms as well as of RbHe and RbHe2 exciplexes.