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Article Dans Une Revue The European Physical Journal D : Atomic, molecular, optical and plasma physics Année : 2019

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

Résumé

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.
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Dates et versions

hal-02153869 , version 1 (22-12-2020)

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François Coppens, Johannes von Vangerow, Antonio Leal, Manuel Barranco, Nadine Halberstadt, et al.. Fall-back time for photo-ionized Cs atoms attached to superfluid 4He nanodroplets. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2019, 73 (5), pp.94. ⟨10.1140/epjd/e2019-90692-0⟩. ⟨hal-02153869⟩
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