Angular distributions of inner-shell photoelectrons from rare-gas clusters

H. Zhang, D. Rolles, Z. D. Pešić, J. D. Bozek, and N. Berrah
Phys. Rev. A 78, 063201 – Published 30 December 2008

Abstract

The photoionization of Ar, Kr, and Xe rare-gas clusters was investigated using angle-resolved time-of-flight photoelectron spectroscopy. Fine-structure-resolved photoelectron angular distributions were determined for the Ar 2p, Kr 3d, and Xe 4d core levels and the Ar 3s inner-valence level as a function of photon energy for two average cluster sizes. Overall, the angular distributions of inner-shell photoelectrons from the cluster and the free atom are found to be very similar, except for the first 1015eV above the respective photoionization thresholds, where the angular anisotropy of the atomic photoelectrons is high, while our measurements demonstrate considerably less anisotropy in the cluster photoelectron emission. The angular distribution of Ar 3s inner-valence photoelectrons from the cluster is substantially less anisotropic than for the atomic photoelectrons throughout the covered photon energy range, but the difference decreases for increasing photon energy.

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  • Received 16 September 2008

DOI:https://doi.org/10.1103/PhysRevA.78.063201

©2008 American Physical Society

Authors & Affiliations

H. Zhang1, D. Rolles1,2,3,*, Z. D. Pešić1,2, J. D. Bozek2,4, and N. Berrah1

  • 1Physics Department, Western Michigan University, Kalamazoo, Michigan 49008, USA
  • 2Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 3Max Planck Advanced Study Group, Center for Free Electron Laser Science, 22761 Hamburg, Germany
  • 4Linac Coherent Light Source, Stanford Linear Accelerator Center, Menlo Park, California 94025, USA

  • *Daniel.Rolles@asg.mpg.de

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Vol. 78, Iss. 6 — December 2008

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