Desorption of alkali atoms from 4He nanodroplets

Physical Chemistry Chemical Physics : PCCP
Alberto HernandoMarcel Drabbels

Abstract

The dynamics following the photoexcitation of Na and Li atoms located on the surface of helium nanodroplets has been investigated in a joint experimental and theoretical study. Photoelectron spectroscopy has revealed that excitation of the alkali atoms via the (n + 1)s ←ns transition leads to the desorption of these atoms. The mean kinetic energy of the desorbed atoms, as determined by ion imaging, shows a linear dependence on excitation frequency. These experimental findings are analyzed within a three-dimensional, time-dependent density functional approach for the helium droplet combined with a Bohmian dynamics description of the desorbing atom. This hybrid method reproduces well the key experimental observables. The dependence of the observables on the impurity mass is discussed by comparing the results obtained for the (6)Li and (7)Li isotopes. The calculations show that the desorption of the excited alkali atom is accompanied by the creation of highly non-linear density waves in the helium droplet that propagate at supersonic velocities.

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Citations

Feb 14, 2012·Physical Chemistry Chemical Physics : PCCP·L FechnerM Mudrich
Oct 1, 2013·Physical Chemistry Chemical Physics : PCCP·David MateoMartí Pi
Jan 17, 2013·The Journal of Chemical Physics·D Pentlehner, A Slenczka
Apr 24, 2012·The Journal of Chemical Physics·Evgeniy Loginov, Marcel Drabbels
Nov 21, 2012·The Journal of Chemical Physics·A HernandoN Halberstadt
Aug 17, 2012·The Journal of Chemical Physics·Xiaohang Zhang, Marcel Drabbels
Apr 10, 2014·The Journal of Chemical Physics·David MateoMarcel Drabbels
Mar 10, 2016·The Journal of Chemical Physics·Antonio LealMartí Pi
Jul 24, 2015·The Journal of Chemical Physics·J von VangerowM Mudrich
Sep 9, 2016·The Journal of Physical Chemistry. a·A SiegM Mudrich
Dec 21, 2016·The Journal of Physical Chemistry Letters·Johannes von VangerowMarcel Mudrich
Mar 23, 2018·Physical Chemistry Chemical Physics : PCCP·François CoppensMarcel Mudrich
Sep 5, 2017·Physical Chemistry Chemical Physics : PCCP·François CoppensMartí Pi
Nov 1, 2018·Physical Chemistry Chemical Physics : PCCP·Maxime MartinezMartí Pi
Nov 6, 2012·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Andreas W HauserWolfgang E Ernst
Jul 31, 2019·Physical Chemistry Chemical Physics : PCCP·François CoppensMartí Pi
Jan 9, 2020·Nature Communications·M MudrichF Stienkemeier
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Sep 26, 2014·Physical Chemistry Chemical Physics : PCCP·Antonio LealManuel Barranco
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Oct 19, 2019·The Journal of Physical Chemistry Letters·L Ben LtaiefM Mudrich
Mar 29, 2014·The Journal of Physical Chemistry. a·Evgeniy Loginov, Marcel Drabbels
Oct 9, 2021·The Journal of Physical Chemistry. a·Nicolas RendlerFrank Stienkemeier

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