Surface location of sodium atoms attached to He-3 nanodroplets - art. no. 214508

[摘要] We have experimentally studied the electronic 3p<--3s excitation of Na atoms attached to He-3 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 He-4 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 He-3 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.

[发布日期] 2004-12-01

[关键词] SUPERFLUID-HELIUM;ALKALI ATOMS;LIQUID-HELIUM;EXCIPLEX FORMATION;MONTE-CARLO;SPECTROSCOPY;NA;MOLECULES;STATES;LI