Rb*He_n exciplexes in solid 4_He

Details Rb*He_n exciplexes in solid 4_He Rb*He_n exciplexes in solid 4_He

2006-05-22

arxiv.org/abs/physics/0605181v1

Physics

Atomic Physics

8 pages, 8 figures

Scientific paper

10.1103/PhysRevA.74.032509

We report the observation of emission spectra from Rb*He_n exciplexes in solid 4He. Two different excitation channels were experimentally identified, viz., exciplex formation via laser excitation to the atomic 5P3/2 and to the 5P1/2 levels. While the former channel was observed before in liquid helium, on helium nanodroplets and in helium gas by different groups, the latter creation mechanism occurs only in solid helium or in gaseous helium above 10 Kelvin. The experimental results are compared to theoretical predictions based on the extension of a model, used earlier by us for the description of Cs*He_n exciplexes. We also report the first observation of fluorescence from atomic rubidium in solid helium, and discuss striking differences between the spectroscopic feature of Rb-He and Cs-He systems.

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