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Fall-back time for photo-ionized Cs atoms attached to superfluid 4He nanodroplets

  • François Coppens
  • Johannes von Vangerow
  • Antonio Leal
  • Manuel Barranco
  • Nadine Halberstadt
  • Marcel Mudrich
  • Martí PiEmail author
  • Frank Stienkemeier
Regular Article
  • 26 Downloads
Part of the following topical collections:
  1. Topical Issue: Dynamics of Systems on the Nanoscale (2018)

Abstract

We have studied the dynamic evolution of a Cs atom photo-excited from 6s to 6p and 7s states on a helium droplet using time-dependent 4He-DFT simulations. Depending on the excited electronic state, the Cs impurity remains on the droplet surface or it is ejected. Upon subsequent photo-ionization of the excited Cs atom the resulting Cs+ cation may either be ejected or come back to the droplet, depending on the time delay between photo-excitation and photo-ionization. We have calculated the critical time delay separating these two different behaviors, as well as final ion velocities. These observables will be used for future comparison with planned pump-probe experiments.

Graphical abstract

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Copyright information

© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • François Coppens
    • 1
  • Johannes von Vangerow
    • 2
  • Antonio Leal
    • 3
  • Manuel Barranco
    • 1
    • 3
    • 4
  • Nadine Halberstadt
    • 1
  • Marcel Mudrich
    • 5
  • Martí Pi
    • 3
    • 4
    Email author
  • Frank Stienkemeier
    • 2
    • 6
  1. 1.Laboratoire des Collisions, Agrégats, Réactivité, IRSAMC, UMR 5589, CNRS et Université Paul Sabatier-Toulouse 3Toulouse Cedex 09France
  2. 2.Physikalisches Institut, Universität FreiburgFreiburgGermany
  3. 3.Departament FQA, Facultat de Fsica, Universitat de BarcelonaBarcelonaSpain
  4. 4.Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de BarcelonaBarcelonaSpain
  5. 5.Department of Physics and AstronomyAarhus UniversityAarhus CDenmark
  6. 6.Freiburg Institute of Advanced Studies (FRIAS), University of FreiburgFreiburgGermany

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