论文标题
c $ _ {2}^{ - } $ anions li和rb原子中的冷碰撞在混合陷阱中
Cold collisions of C$_{2}^{-}$ anions with Li and Rb atoms in hybrid traps
论文作者
论文摘要
我们介绍了与c $ _ {2}^{ - } $在低温下在混合陷阱实验中的交感神经冷却的背景下，Li和Rb原子与C $ _ {2}^{ - } $分子阴离子的反应性和非反应性碰撞的理论研究。基于最近报道，Li-C $ _ {2}^{ - } $和RB-C $ _ {2}^{ - } $ Systems的单元和三重态的准确势能表面，我们表明，如果碰撞党的状态在基地状态下，但如果他们很快，我们就表明，关联电子脱离反应会很慢。结果预计将代表碱金属系列。我们还研究了旋转无弹性碰撞，以探索杂交离子原子陷阱中C $ _2^ - $的平移和旋转自由度的冷却。通过考虑碰撞能量的Tsallis分布来考虑微动作的影响。我们表明，转化冷却比旋转冷却更快，而激发原子的存在会导致与旋转冷却相当的时间表上阴离子的损失。
We present a theoretical investigation of reactive and non-reactive collisions of Li and Rb atoms with C$_{2}^{-}$ molecular anions at low temperatures in the context of sympathetic cooling in hybrid trap experiments. Based on recently reported accurate potential energy surfaces for the singlet and triplet states of the Li-C$_{2}^{-}$ and Rb-C$_{2}^{-}$ systems, we show that the associative electronic detachment reaction is slow if the colliding partners are in their ground state, but fast if they are excited. The results are expected to be representative of the alkali-metal series. We also investigate rotationally inelastic collisions in order to explore the cooling of the translational and rotational degrees of freedom of C$_2^-$ in hybrid ion-atom traps. The effect of micromotion is taken into account by considering Tsallis distributions of collision energies. We show that the translational cooling occurs much more rapidly than rotational cooling and that the presence of excited atoms leads to losses of anions on a timescale comparable to that of rotational cooling.
