Photoelectron Imaging of Helium Droplets

Darcy S. Peterka, Albrecht Lindinger, Lionel Poisson, Musahid Ahmed, and Daniel M. Neumark
Phys. Rev. Lett. 91, 043401 – Published 25 July 2003

Abstract

The photoionization and photoelectron spectroscopy of He nanodroplets (104 atoms) has been studied by photoelectron imaging with photon energies from 22.5–24.5 eV. Total electron yield measurements reveal broad features, whose onset is 1.5eV below the ionization potential of atomic He. The photoelectron spectra are dominated by very low energy electrons, with Ek less than 0.6 meV. These results are attributed to the formation and autoionization of highly vibrationally excited Hen* Rydberg states within the cluster, followed by strong final state interactions between the photoelectron and the droplet.

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  • Received 27 November 2002

DOI:https://doi.org/10.1103/PhysRevLett.91.043401

©2003 American Physical Society

Authors & Affiliations

Darcy S. Peterka1,2, Albrecht Lindinger2, Lionel Poisson1,2, Musahid Ahmed2, and Daniel M. Neumark1,2

  • 1Department of Chemistry, University of California, Berkeley, California 94720, USA
  • 2Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

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Issue

Vol. 91, Iss. 4 — 25 July 2003

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