Trapping cold ground state argon atoms.
Trapping cold ground state argon atoms.
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捕获冷基态氩原子。
DOI：
10.1103/physrevlett.113.183001
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发表时间：
2014
影响因子：
8.6
通讯作者：
Edmunds PD
中科院分区：
文献类型：
--
作者：
Edmunds PD
我们将冷的基态氩原子捕获在由累积腔产生的深光学偶极子阱中。原子是分子交感冷却的一般来源，通过从激光冷却的亚稳氩原子云中淬灭它们而装入陷阱。虽然不能直接探测基态原子，但我们可以通过观察共俘获亚稳氩原子的碰撞损失来探测基态原子，并确定其弹性截面。利用一种参数损耗谱法，我们还确定了亚稳态的极化率为。最后，确定了在没有光辅助碰撞的情况下，亚稳原子的Penning和联想损失为。
We trap cold, ground state argon atoms in a deep optical dipole trap produced by a buildup cavity. The atoms, which are a general source for the sympathetic cooling of molecules, are loaded in the trap by quenching them from a cloud of laser-cooled metastable argon atoms. Although the ground state atoms cannot be directly probed, we detect them by observing the collisional loss of cotrapped metastable argon atoms and determine an elastic cross section. Using a type of parametric loss spectroscopy we also determine the polarizability of the metastablestate to be. Finally, Penning and associative losses of metastable atoms in the absence of light assisted collisions, are determined to be.