Energy Scaling of Cold Atom-Atom-Ion Three-Body Recombination
Energy Scaling of Cold Atom-Atom-Ion Three-Body Recombination
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DOI：
10.1103/physrevlett.116.193201
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发表时间：
2016-05-12
影响因子：
8.6
通讯作者：
Greene, Chris H.
中科院分区：
文献类型：
--
作者：
Kruekow, Artjom;Mohammadi, Amir;Greene, Chris H.
本文研究了Ba ~（+ +）Rh ~（++）在mK区的三体复合，其中单个Ba ~（138）（+）离子在Paul阱中浸入超冷Rb ~（87）原子云中。我们测量了三体反应速率系数k3与能量的关系，并将结果与理论预测进行了比较，k（3）与E-col-（3/4）成正比，其中Eco 1是碰撞能量。我们发现协议，如果我们假设非热离子的能量分布是由至少两个不同的微动引起的能量尺度。此外，使用经典的轨迹计算，我们预测如何形成的分子的结合能与碰撞能量的比例。我们的研究提供了新的见解离子浸没在一个超冷原子云的动力学和产生重要的前景，原子离子实验的目标s波制度。
We study three-body recombination of Ba+ + Rh + Rh in the mK regime where a single Ba-138(+) ion in a Paul trap is immersed into a cloud of ultracold Rb-87 atoms. We measure the energy dependence of the three-body rate coefficient k3 and compare the results to the theoretical prediction, k(3) proportional to E-col-(3/4), where Eco1 is the collision energy. We find agreement if we assume that the nonthermal ion energy distribution is determined by at least two different micromotion induced energy scales. Furthermore, using classical trajectory calculations we predict how the median binding energy of the formed molecules scales with the collision energy. Our studies give new insights into the kinetics of an ion immersed in an ultracold atom cloud and yield important prospects for atom-ion experiments targeting the s-wave regime.