论文标题
测量激光冷却剖宫产与被困丘离子之间的碰撞
Measurement of collisions between laser cooled cesium atoms and trapped cesium ions
论文作者
论文摘要
我们报告了超速CS原子与低能CS+离子之间碰撞的碰撞速率系数的测量。实验是在由CS原子的磁光陷阱（MOT）和CS+离子的Paul陷阱组成的混合陷阱中进行的。离子原子的碰撞将动能传递给超低CS原子，从而从浅MoT中逃脱，因此，MOT中CS原子的数量减少了。通过使用荧光测量值监测，CS原子数和MOT载荷动力学，然后将数据拟合到速率方程模型中，从而得出了离子原子碰撞速率。 CS-CS+碰撞率系数$ 9.3（\ PM0.4）（\ PM1.2）（\ PM3.5）\ Times 10^{ - 14} $ M $^{3} $ s $ s $ s $^{ - 1} $，用于离子分布，以95 mev（$ \ k）（$ \ k）的大致colliental collision collistion colligantia计算。作为中间步骤，我们还确定CS $ 6P_ {3/2} $ ATOM的光电离子横截面的473 nm波长为$ 2.28（\ pm 0.33）\ times 10^{ - 21} $ M $^{2} $。
We report the measurement of collision rate coefficient for collisions between ultracold Cs atoms and low energy Cs+ ions. The experiments are performed in a hybrid trap consisting of a magneto-optical trap (MOT) for Cs atoms and a Paul trap for Cs+ ions. The ion-atom collisions impart kinetic energy to the ultracold Cs atoms resulting in their escape from the shallow MOT and, therefore, in a reduction in the number of Cs atoms in the MOT. By monitoring, using fluorescence measurements, the Cs atom number and the MOT loading dynamics and then fitting the data to a rate equation model, the ion-atom collision rate is derived. The Cs-Cs+ collision rate coefficient $9.3(\pm0.4)(\pm1.2)(\pm3.5) \times 10^{-14}$ m$^{3}$s$^{-1}$, measured for an ion distribution with most probable collision energy of 95 meV ($\approx k_{B}.1100$ K), is in fair agreement with theoretical calculations. As an intermediate step, we also determine the photoionization cross section of Cs $6P_{3/2}$ atoms at 473 nm wavelength to be $2.28 (\pm 0.33) \times 10^{-21}$ m$^{2}$.
