Rb*Hen exciplexes in solid ⁴He

Hofer, Adrian; Moroshkin, Peter; Nettels, Daniel; Ulzega, Simone; Weis, Antoine

doi:10.1103/PhysRevA.74.032509

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Journal article

Rb^*He_n exciplexes in solid ⁴He

Hofer, Adrian Department of Physics, University of Fribourg, Switzerland
Moroshkin, Peter Department of Physics, University of Fribourg, Switzerland
Nettels, Daniel Department of Physics, University of Fribourg, Switzerland
Ulzega, Simone Department of Physics, University of Fribourg, Switzerland
Weis, Antoine Department of Physics, University of Fribourg, Switzerland

26.09.2006

Published in:

Physical Review A. - 2006, vol. 74, p. 032509

English 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 5P_3/2 and to the 5P_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_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.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language