Rb*He{sub n} exciplexes in solid {sup 4}He
- Departement de Physique, Universite de Fribourg, Chemin du Musee 3, 1700 Fribourg (Switzerland)
We report the observation of emission spectra from Rb*He{sub n} exciplexes in solid {sup 4}He. Two different excitation channels were experimentally identified, viz., exciplex formation via laser excitation to the atomic 5P{sub 3/2} and to the 5P{sub 1/2} 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 K. 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{sub n} exciplexes. We also report the observation of fluorescence from atomic rubidium in solid helium, and discuss striking differences between the spectroscopic features of Rb-He and Cs-He systems.
- OSTI ID:
- 20857697
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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