储存环内Na的光缔合电离
Photoassociative ionization of Na inside a storage ring
摘要：
出于最近的兴趣在低维阵列的原子，我们实验研究的方式冷碰撞过程的影响所考虑的原子样品的几何形状。更具体地说，我们研究了光缔合电离（PAI）的情况下，无论是在存储环的碰撞是更单向的字符和在一个陷阱具有明确的不确定性的碰撞轴。首先，建立一个环形陷阱（atomotron），我们研究了双色PAI与强度和偏振的探测激光的依赖。PAI率的强度依赖性也被测量在磁光阱呈现等效的温度和密度条件。实际上，结果表明，在环阱中，PAI速率常数的值低得多，并且不显示饱和的证据，这与3D-MOT的情况不同。储存环中的冷原子碰撞可能代表新的研究可能性。
英文摘要：
Motivated by recent interest in low dimensional arrays of atoms, we experimentally investigated the way cold collisional processes are affected by the geometry of the considered atomic sample. More specifically, we studied the case of photoassociative ionization (PAI) both in a storage ring where collision is more unidirectional in character and in a trap with clear undefinition of collision axis. First, creating a ring shaped trap (atomotron) we investigated two-color PAI dependence with intensity and polarization of a probing laser. The intensity dependence of the PAI rate was also measured in a magneto-optical trap presenting equivalent temperature and density conditions. Indeed, the results show that in the ring trap, the value of the PAI rate constant is much lower and does not show evidences of saturation, unlike in the case of the 3D-MOT. Cold atomic collisions in storage ring may represent new possibilities for study.
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