Population distribution of product states following three-body recombination in an ultracold atomic gas
Population distribution of product states following three-body recombination in an ultracold atomic gas
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DOI：
10.1038/nphys2661
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发表时间：
2013-08-01
期刊：
影响因子：
19.6
通讯作者：
Denschlag, J. Hecker
中科院分区：
文献类型：
--
作者：
Haerter, A.;Kruekow, A.;Denschlag, J. Hecker
三体复合是一种碰撞过程，其中两个原子联合收割机结合形成一个分子，第三个原子带走部分释放的反应能量。在这里，我们实验确定的第一次的人口分布的分子反应产物后，三体复合的非共振粒子相互作用。我们的测量的关键是一个敏感的检测方案，结合了随后的离子捕获的分子的光电离。使用超冷Rb-87气体在非常低的动能低于h × 20 kHz，我们发现了一个广泛的人口的最终状态的结合能高达h × 750 GHz。这是在与以前的实验，在共振相互作用制度，发现一个占主导地位的人口只有最弱的结合分子状态或Efimov共振的发生。这项工作可能有助于发展一个深入的模型，可以定性和定量预测的三体复合的反应产物。
Three-body recombination is a collision process where two atoms combine to form a molecule and a third atom carries away part of the released reaction energy. Here, we experimentally determine for the first time the population distribution of the molecular reaction products after a three-body recombination for non-resonant particle interactions. The key to our measurements is a sensitive detection scheme that combines the photoionization of the molecules with subsequent ion trapping. Using an ultracold Rb-87 gas at very low kinetic energy below h x 20 kHz, we find a broad population of final states with binding energies of up to h x 750 GHz. This is in contrast with previous experiments, performed in the resonant interaction regime, that found a dominant population of only the most weakly bound molecular state or the occurrence of Efimov resonances. This work may contribute to the development of an in-depth model that can qualitatively and quantitatively predict the reaction products of three-body recombination.