Issue 42, 2011
From the journal:

Physical Chemistry Chemical Physics

Spectroscopy of nS, nP, and nD Rydberg series of Cs atoms on helium nanodroplets

F. Lackner,*a   G. Krois,a   M. Theisen,a   M. Kocha  and  W. E. Ernsta  

* Corresponding authors

a Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria
E-mail: florian.lackner@tugraz.at

Abstract

The preparation of an artificial superatom consisting of a positive charge inside a superfluid helium nanodroplet and an electron in an orbital surrounding the droplet is of fundamental interest and represents an experimental challenge. In this work, nanodroplets of several thousand helium atoms are doped with single caesium (Cs) atoms. While on the droplet, the Cs valence electron is excited in two steps through an intermediate state into nS, nP, and nD states. The excitation is monitored by laser induced fluorescence or, for high principal quantum numbers, by resonant three-photon-ionization. On-droplet Rydberg excitations are resolved up to about n = 20. The energies are compared with those of free Cs atom Rydberg states and quantum defects as well as the on-droplet ionization threshold are derived.

Graphical abstract: Spectroscopy of nS, nP, and nD Rydberg series of Cs atoms on helium nanodroplets

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Article information

DOI
https://doi.org/10.1039/C1CP21280J
Article type
Paper
Submitted
21 Apr 2011
Accepted
04 Jul 2011
First published
25 Jul 2011

Phys. Chem. Chem. Phys., 2011,13, 18781-18788

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Spectroscopy of nS, nP, and nD Rydberg series of Cs atoms on helium nanodroplets

F. Lackner, G. Krois, M. Theisen, M. Koch and W. E. Ernst, Phys. Chem. Chem. Phys., 2011, 13, 18781 DOI: 10.1039/C1CP21280J

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