Abstract

We present a computational investigation of the photodetachment (PD) dynamics of C₂H⁻ in its ground, electronic ¹Σ state, cooled in an ion trap with He as a buffer gas. Our analysis employs a range of PD rates from quantum dynamics, selective choices of the anion’s initial rotational state populations as the laser is switched on, and different operational trap conditions. Our results show that a variety of outcomes for the initial state-dependent PD process is possible by selecting different initial conditions in the cold trap, the latter generating a dynamical interplay between the anion’s populations of rotational states, induced by the buffer gas, and the chosen laser frequency and laser power. Specific parameter selections during the PD process will be shown to cause different abundances of the rotational states of the anion in the trap.

Graphical abstract

中文翻译：

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冷离子阱中的光解离

摘要

我们提出C的光剥离（PD）动力学的计算调查₂ ħ ^-在其地面，电子¹处于Σ态，以He作为缓冲气体在离子阱中冷却。我们的分析采用了一系列的PD速率，这些速率包括量子动力学，在打开激光时对阴离子初始旋转状态总体的选择性选择以及不同的操作陷阱条件。我们的结果表明，通过在冷阱中选择不同的初始条件，可以实现与初始状态相关的PD过程的各种结果，后者会在阴离子的旋转态总体（由缓冲气体引起的）与离子交换态之间产生动态相互作用。选择的激光频率和激光功率。PD过程中的特定参数选择将显示出导致陷阱中阴离子旋转状态的丰度不同。

图形概要