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Surface location of sodium atoms attached to $^3$He nanodroplets

F. Stienkemeier·O. Bünermann·R. Mayol·F. Ancilotto·M. Barranco·M. Pi
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Abstract

We have experimentally studied the electronic $3p\leftarrow 3s$ excitation of Na atoms attached to $^3$He droplets by means of laser-induced fluorescence as well as beam depletion spectroscopy. From the similarities of the spectra (width/shift of absorption lines) with these of Na on $^4$He droplets, we conclude that sodium atoms reside in a ``dimple'' on the droplet surface and that superfluid-related effects are negligible. The experimental results are supported by Density Functional calculations at zero temperature, which confirm the surface location of sodium on $^3$He droplets, and provide a detailed description of the ``dimple'' structure. The calculated shift of the excitation spectra for the two isotopes is in good agreement with the experimental data.

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F. Stienkemeier, O. Bünermann, R. Mayol, F. Ancilotto, M. Barranco, M. Pi. 2004-10-26. Surface location of sodium atoms attached to $^3$He nanodroplets. https://arxiv.org/abs/cond-mat/0410670

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