Two-electron excitation of an interacting cold Rydberg gas.
Two-electron excitation of an interacting cold Rydberg gas.
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DOI：
10.1103/physrevlett.105.213004
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发表时间：
2010-08
影响因子：
8.6
通讯作者：
J. Millen;G. Lochead;Matthew Jones
中科院分区：
文献类型：
--
作者：
J. Millen;G. Lochead;Matthew Jones
我们报道了锶原子相互作用的冷里德伯气体的产生。我们发现，内层价电子的激发谱对里德伯气体中的相互作用是敏感的，即使它们是由外层里德伯电子介导的，通过研究这一谱的演化，我们观察到密度依赖的布居转移到更高的角动量l.我们确定的里德伯原子转移的分数，并确定占主导地位的转移机制是l-变化的电子里德伯碰撞与冷等离子体的形成。
We report the creation of an interacting cold Rydberg gas of strontium atoms. We show that the excitation spectrum of the inner valence electron is sensitive to the interactions in the Rydberg gas, even though they are mediated by the outer Rydberg electron. By studying the evolution of this spectrum we observe density-dependent population transfer to a state of higher angular momentum l. We determine the fraction of Rydberg atoms transferred, and identify the dominant transfer mechanism to be l-changing electron-Rydberg collisions associated with the formation of a cold plasma.