Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments
Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments
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DOI：
10.1039/c1cp21191a
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发表时间：
2011-01-01
影响因子：
3.3
通讯作者：
Ernst, Wolfgang E.
中科院分区：
文献类型：
--
作者：
Giese, Christian;Stienkemeier, Frank;Ernst, Wolfgang E.
利用单色飞秒（fs）光离（PI）光谱研究了在氦纳米液滴上形成的K3-nRbn型（n = 0,1,2,3）的同核和异核碱基四聚体。得到的频率分配给不同电子状态下的振动，并与涉及势的高水平从头计算进行比较，包括明显的Jahn-Teller和自旋轨道耦合。尽管由此产生的重碱分子的复杂振动结构使实验和理论的比较变得复杂，但我们发现所有物种的许多观测线都很一致。
Homo- and heteronuclear alkali quartet trimers of type K3-nRbn (n = 0,1,2,3) formed on helium nanodroplets are probed by one-color femtosecond (fs) photoionization (PI) spectroscopy. The obtained frequencies are assigned to vibrations in different electronic states in comparison to high level ab initio calculations of the involved potentials including pronounced Jahn-Teller and spin-orbit couplings. Despite the fact that the resulting complex vibronic structure of the heavy alkali molecules complicates the comparison of experiment and theory we find good agreement for many of the observed lines for all species.