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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.

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Publisher statement:© 2010 American Physical Society
Record Created:28 Nov 2012 09:35
Last Modified:28 Nov 2012 10:46

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