A comparison of photoelectron spectroscopy and two-photon ionization spectroscopy : excited states of Au2, Au3, and Au4
A comparison of photoelectron spectroscopy and two-photon ionization spectroscopy : excited states of Au2, Au3, and Au4
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光电子能谱和双光子电离能谱的比较：Au2、Au3 和 Au4 的激发态
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
W. Eberhardt
中科院分区：
文献类型：
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作者：
H. Handschuh;G. Ganteför;P. S. Bechthold;W. Eberhardt
报道了 n=2-4 的 Au−n 的光电子能谱。由于我们的实验中使用了相对较高的光子能量（hν=6.424 eV）和约50 meV的能量分辨率，解决了中性团簇激发态的各种跃迁。事实证明，光电子能谱可以作为团簇电子态的图，而高分辨率的共振双光子电离（R2PI）方法可以获得有关态对称性的信息。与Ag−n团簇的类似数据的比较表明了Au的相对论效应和大自旋轨道分裂的影响。
Photoelectron spectra of Au−n with n=2–4 are reported. Due to the relatively high photon energy used in our experiment (hν=6.424 eV) and the energy resolution of about 50 meV, various transitions into excited states of the neutral clusters are resolved. It is demonstrated that photoelectron spectra can serve as a map of the electronic states of a cluster, while the high resolution of the resonant two‐photon ionization (R2PI) method gains information about the symmetry of the states. The comparison with similar data of Ag−n clusters indicates the influence of relativistic effects and the large spin–orbit splitting for Au.