We study both theoretically and experimentally the energy dependence of the low-energy Rb + –Rb total collision rate k ia in the energy range from 10 3 to 10 4 K. We calculate the integral elastic cross-section and the resonant charge-transfer cross-section by the quantum mechanical molecular orbital close-coupling method, and then obtain k ia for temperatures by averaging the cross-sections over a Maxwell–Boltzmann velocity distribution. The experiments are conducted in an ion–neutral hybrid trap, where the Rb + ions are created by photo-ionization of the cold atoms in a magneto-optic trap (MOT) and accumulated in the linear Paul ion trap. The total ion–atom collision rate k ia is measured by monitoring the fluorescence reduction of the steady-state MOT atoms by sequentially introducing photo-ionization and ion–atom collisions. The ion–atom collision energy E col ≈ ...

中文翻译：

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Rb + –Rb碰撞速率在10 3 –10 4 K的能量范围内

我们在理论和实验上都研究了低能Rb + -Rb总碰撞率k ia在10 3至10 4 K能量范围内的能量依赖性。我们计算了积分弹性截面和共振电荷转移截面通过量子力学分子轨道紧密耦合方法进行截面，然后通过对麦克斯韦-玻尔兹曼速度分布上的截面求平均值来获得温度的k ia。实验在离子-中性混合阱中进行，其中Rb +离子是通过磁光阱（MOT）中冷原子的光电离产生的，并累积在线性Paul离子阱中。总离子-原子碰撞速率k ia是通过依次引入光电离和离子-原子碰撞来监测稳态MOT原子的荧光降低来测量的。