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research article

Spectroscopy on Rydberg states of sodium atoms on the surface of helium nanodroplets

Loginov, Evgeniy  
•
Callegari, Carlo
•
Ancilotto, Francesco
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2011
The Journal of Physical Chemistry A

One- and two-photon excitation spectra of sodium atoms on the surface of helium droplets are reported. The spectra are recorded by monitoring the photoionization yield of desorbed atoms as function of excitation frequency. The excitation spectra involving states with principal quantum number up to n=6 can be reproduced by a pseudo-diatomic model where the helium droplet is treated as a single atom. For the lowest excited states of sodium, the effective interaction potentials for this system can be approximated by the sum of NaHe pair potentials. For the higher excited states, the interaction of the sodium valence electron with the helium induces significant configuration mixing leading to a failure of this approach. For these states, effective interactions potentials based on a perturbative treatment of the interactions between the valence electron, the alkali positive core and the helium, as described in detail in the accompanying publication, yield excellent agreement with experiment.

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Type
research article
DOI
10.1021/jp111146n
Web of Science ID

WOS:000291895500003

Author(s)
Loginov, Evgeniy  
Callegari, Carlo
Ancilotto, Francesco
Drabbels, Marcel  
Date Issued

2011

Publisher

American Chemical Society

Published in
The Journal of Physical Chemistry A
Volume

115

Article Number

6779

Subjects

helium droplets

•

spectroscopy

•

Rydberg

•

Sodium

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCPM  
Available on Infoscience
January 14, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/62997
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