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在小团中发生的原子间库伦比衰变
Sévan Kazandjian1, Max Kircher2, Gregor Kastirke2
1Sorbonne Universite, CNRS, Laboratoire de Chimie Physique Matiere et Rayonnement, UMR 7614, F-75005 Paris, France. nicolas.sisourat@sorbonne-universite.fr.
Physical chemistry chemical physics : PCCP
|September 18, 2023
概括
团中的原子间库伦体衰变 (ICD) 在较大的团中更快,这是由于更多的衰变通道和更接近的原子. 这种超快的过程影响离子动能,揭示了集群大小分布.
科学领域:
- 原子和分子物理 原子和分子物理
- 量子化学 是一个量子化学.
- 集群科学 集群科学 集群科学
背景情况:
- 原子间库伦原子衰变 (ICD) 是一种非辐射过程,其中激发原子之间的能量转移,导致电离.
- 在团中,ICD可能发生在单个原子的电离和激发后,导致库伦爆炸.
- 了解小团中的ICD动态对于解释实验观测至关重要.
研究的目的:
- 从理论上研究小团 (2-7个原子) 中的原子间库伦衰变 (ICD).
- 将理论发现与不同平均大小的团的实验巧合测量进行比较.
- 阐明集群大小对ICD速率和衰变动态的影响.
主要方法:
- 在从2到7个原子的团中进行ICD的理论研究.
- 理论预测与实验巧合测量的比较.
- 分析由ICD和挫败的库伦爆炸引起的离子的动能分布.
主要成果:
- 随着集群大小的增加,ICD速率会增加,这是由于更多的衰变通道和减少的原子间距离.
- 为激发的二元体的寿命提供了一个预测.
- 动能分布揭示了电荷交换过程 (挫败的库伦爆炸),在较大的星团中变得更有可能发生.
结论:
- 在小型团中,ICD是显著的衰变途径,其速率严重依赖于团大小.
- 观察到的动能分布是集群大小分布的特征,并提供了对挫败的库伦爆炸动态的见解.
- 理论建模成功地重现了实验发现,验证了在团中ICD的理解.
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