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Two-electron excitation of an interacting cold Rydberg gas.

Millen, J. and Lochead, G. and Jones, M.P.A. (2010) 'Two-electron excitation of an interacting cold Rydberg gas.', Physical review letters., 105 (21). p. 213004.


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.

Item Type:Article
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Publisher statement:© 2010 American Physical Society
Date accepted:No date available
Date deposited:28 November 2012
Date of first online publication:November 2010
Date first made open access:No date available

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