论文标题
c $ _2 $ - 元素与He，NE和AR原子发生冲突
Rovibrational quenching of C$_2$-anions in collisions with He, Ne, and Ar atoms
论文作者
论文摘要
双碳分子阴离子目前引起了激光冷却的候选感兴趣，这是由于其电子结构和对地面电子和振动状态的有利分支比率。氦气已被提议作为缓冲气体，以冷却分子的内部运动。我们使用量子散射理论计算了与HE以及NE和AR的二碳阴离子以及NE和AR的横截面和相应的速率。 HE和NE的振动淬火速率非常小，与氦气碰撞时中性分子的小分子相似。但是，AR的淬火速率远大于具有其他贵重气体的淬火率，这表明这可能是一种更合适的气体，用于驱动陷阱中的振动淬火。讨论了这些结果对二甲苯阴离子激光冷却的含义。
The dicarbon molecular anion is currently of interest as a candidate for laser cooling due to its electronic structure and favorable branching ratios to the ground electronic and vibrational states. Helium has been proposed as a buffer gas to cool the molecule's internal motion. We calculate the cross sections and corresponding rates for rovibrational inelastic collisions of the dicarbon anion with He, and also with Ne and Ar, on three-dimensional ab initio potential energy surfaces using quantum scattering theory. The rates for vibrational quenching with He and Ne are very small and are similar to those for small neutral molecules in collision with helium. The quenching rates for Ar, however, are far larger than those with the other noble gases, suggesting that this may be a more suitable gas for driving vibrational quenching in traps. The implications of these results for laser cooling of the dicarbon anion are discussed.
