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State-to-state quantum dynamics of O + O2 isotope exchange reactions reveals nonstatistical behavior at atmospheric conditions

机译:O + O2同位素交换反应的状态间量子动力学揭示了大气条件下的非统计行为

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摘要

The O + O2 exchange reaction is a prerequisite for the formation of ozone in Earth’s atmosphere. We report here state-to-state differential and integral cross sections for several O + O2 isotope-exchange reactions obtained by dynamically exact quantum scattering calculations at collision energies relevant to atmospheric conditions. These reactions are shown to be highly nonstatistical, evidenced by dominant forward scattering and deviation of the integral cross section from the statistical limit. Mechanistic analyses revealed that the nonstatistical channel is facilitated by short-lived osculating resonances. The theoretical results provided an in-depth interpretation of a recent molecular beam experiment of the exchange reaction and shed light on the initial step of ozone recombination.
机译:O + O 2交换反应是在地球大气中形成臭氧的先决条件。我们在这里报告了几种O + O 2同位素交换反应的状态至状态微分和积分截面,这些反应是通过在与大气条件相关的碰撞能量下动态精确地进行量子散射计算而获得的。这些反应被证明是高度非统计性的,这主要由正向散射和积分截面与统计极限的偏差所证明。机理分析表明,非统计通道是由短暂的振荡共振促进的。理论结果为最近的交换反应分子束实验提供了深入的解释,并阐明了臭氧重组的初始步骤。

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