Lyman-series emission after valence and core excitation of water vapor

A. Hans, A. Knie, Ph. Schmidt, L. Ben Ltaief, C. Ozga, Ph. Reiß, H. Huckfeldt, M. Förstel, U. Hergenhahn, and A. Ehresmann
Phys. Rev. A 92, 032511 – Published 24 September 2015

Abstract

We report Lyman-series emission cross sections of neutral hydrogen dissociation fragments after valence (15–34 eV) and inner-shell (533–542 eV) excitation of water vapor with monochromatic synchrotron radiation as functions of the exciting-photon energy. In the valence excitation energy region, the thermodynamical limits of the production of the differently excited hydrogen fragments are directly observed and absolute emission cross sections are determined. For resonant inner-shell excitations, the fluorescing excited hydrogen state is found to be strongly dependent on the molecular or Rydberg-like character of the excitation.

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  • Received 17 June 2015

DOI:https://doi.org/10.1103/PhysRevA.92.032511

©2015 American Physical Society

Authors & Affiliations

A. Hans1,*, A. Knie1, Ph. Schmidt1, L. Ben Ltaief1, C. Ozga1, Ph. Reiß1, H. Huckfeldt1, M. Förstel2,†, U. Hergenhahn2, and A. Ehresmann1

  • 1Institut für Physik, Universität Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel, Germany
  • 2Max-Planck-Institut für Plasmaphysik, Wendelsteinstrasse 1, 17491 Greifswald, Germany

  • *hans@physik.uni-kassel.de
  • Present address: Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA.

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Vol. 92, Iss. 3 — September 2015

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