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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Rovibrational Characterization of High-Lying Electronic States of Cu-2 by Double-Resonant Nonlinear Spectroscopy
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Rovibrational Characterization of High-Lying Electronic States of Cu-2 by Double-Resonant Nonlinear Spectroscopy

机译：双谐振非线性光谱法高躺线电子状态的鲁钝表征

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The available knowledge of the electronically excited states of the copper dimer is limited. This is common for transition metals, as the high density of states hinders both experimental assignment and computation. In this work, two-color resonant four-wave mixing spectroscopy was applied to neutral Cu-2 in the gas phase. The method yielded accurate positions of individual rovibrational lines in the I-X and J-X electronic systems. This revealed the term symbols for the I and J states as (1)pi(u) (1(u)) and (1)sigma(+)(u) (0(u)(+)) respectively. For the Cu-63(2) isotopologue, accurate molecular constants were obtained. The characterization of the J state finally allowed decisive determination of its electron configuration. The J state is obtained from the ground state by promotion of a 3d pi(g) electron into the weakly bonding 4p pi(u) molecular orbital. From the data analysis, lifetimes of the I state (between 10 ps and 5 ns) and J state (66 ns) were inferred.
机译：铜二聚体的电子激发态的可用知识是有限的。 这对于过渡金属是常见的，因为状态的高密度阻碍了实验分配和计算。 在该工作中，将双色共振四波混合光谱施用于气相中的中性Cu-2。 该方法在I-X和J-X电子系统中产生了个体振动线的精确位置。 这向I和J所阐述的符号符号为（1）pi（u）（1（u））和（1）sigma（+）（u）（0（u）（+））。 对于Cu-63（2）同位素，获得精确的分子常数。 J态的表征最终允许对其电子配置的决定性确定。 通过将3D PI（G）电子电子进入弱键合4P PI（U）分子轨道来从地面稳定地获得J状态。 根据数据分析，推断出I状态的寿命（在10 ps和5 ns）和j态（66ns之间）。

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