We analyze the experiment by Hultgren et al. [Phys. Rev. A 87, 031404 (2013)] on orbital alignment and quantum beats in coherently excited atomic fine-structure manifolds produced by short-pulse laser photodetachment of C-, Si-, and Ge- negative ions, and derive a formula that describes the beats. Analysis of the experimental data enables us to extract the noncoherent background contribution for each species, and indicates the need for a full density-matrix treatment of the problem.
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机译：我们分析了Hultgren等人的实验。 [物理Rev. A 87，031404（2013）]，研究了由C-，Si-和Ge-负离子的短脉冲激光光解产生的相干激发原子精细结构流形中的轨道排列和量子拍，并推导了描述节拍。对实验数据的分析使我们能够提取每种物种的非相干背景贡献，并表明需要对该问题进行完全密度矩阵处理。
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