The single, double, and triple Auger decays from the 1s shake-up states of O₂ have been studied using a multi-electron coincidence method. Efficient populations of two-hole final states are observed in single Auger decays of the π-π* shake-up states, which is understood as a characteristic property of the Auger transitions from shake-up states of an open-shell molecule. The O₂³⁺ populations formed by double Auger decays show similar profiles for both the O1s⁻¹ and shake-up states, which is due to the contributions from cascade double Auger processes. While the cascade contributions to the double Auger decays increase with the initial shake-up energy, the probability of direct double Auger processes remains unchanged between the O1s⁻¹ and shake-up states, which implies a weak influence of the excited electron on the double Auger emission that originates from the electron correlation effect.

中文翻译：

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单，双和三重俄歇因氧分子的1s振摇状态而衰减

使用多电子重合方法研究了O ₂的1s振摇状态的单，双和三重俄歇衰变。在π-π*摇动状态的单个俄歇衰变中观察到有效的两孔最终态种群，这被理解为是开壳分子从摇晃态起的俄歇跃迁的特征。由双俄歇衰变形成的O ₂ ³⁺种群在O1s ^-1和振摇状态下都显示出相似的分布，这是由于级联双俄歇过程的贡献所致。尽管级联对双俄歇衰变的贡献随着初始振动能量的增加而增加，但直接双俄歇过程的概率在O1s ^-1之间保持不变。 和摇动状态，这意味着激发电子对源自电子相关效应的双俄歇发射的影响较弱。