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Energy loss of 18 keV electrons in gaseous T \(\) and quench condensed D \(\) films

  • V.N. Aseev
  • A.I. Belesev
  • A.I. Berlev
  • E.V. Geraskin
  • O.V. Kazachenko
  • Yu.E. Kuznetsov
  • V.M. Lobashev
  • R.P. Ostroumov
  • N.A. Titov
  • S.V. Zadorozhny
  • Yu.I. Zakharov
  • J. Bonn
  • B. Bornschein
  • L. Bornschein
  • E.W. Otten
  • M. Przyrembel
  • Ch. Weinheimer
  • A. Saenz

Abstract:

Measurements of the energy loss of fast electrons at an energy of 18 keV have been performed on molecules of hydrogen isotopes, gaseous T 2 and frozen D 2 . Whereas in the case of gaseous T 2 the values of total inelastic cross-section (\(\) cm2 for E = 18.6 keV), average energy loss (\(\) eV) and peak position of the energy loss spectra (\(\) eV) agree well with the expectations, the corresponding values for quench condensed D 2 differ significantly from the ones for gaseous T 2 . We observe a significant lower total inelastic cross-section (\(\) cm2, for E = 18.6 keV) larger average energy loss (\(\) eV) and higher peak position (\(\) eV). These differences may be interpreted in terms of changes of the final state spectrum. A CI calculation for a D 2 cluster shows indeed a clear shift of the excited states in agreement with the observation.

PACS. 34.80.Gs Molecular excitation and ionization by electron impact - 78.90.+t Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • V.N. Aseev
    • 1
  • A.I. Belesev
    • 1
  • A.I. Berlev
    • 1
  • E.V. Geraskin
    • 1
  • O.V. Kazachenko
    • 1
  • Yu.E. Kuznetsov
    • 1
  • V.M. Lobashev
    • 1
  • R.P. Ostroumov
    • 1
  • N.A. Titov
    • 1
  • S.V. Zadorozhny
    • 1
  • Yu.I. Zakharov
    • 1
  • J. Bonn
    • 2
  • B. Bornschein
    • 2
  • L. Bornschein
    • 2
  • E.W. Otten
    • 2
  • M. Przyrembel
    • 2
  • Ch. Weinheimer
    • 2
  • A. Saenz
    • 3
  1. 1.Institute for Nuclear Research, Academy of Sciences of Russia, 60th October Anniversary Prospect 7a, 117312 Moscow, RussiaRU
  2. 2.Institute of Physics, Joh. Gutenberg University, 55099 Mainz, GermanyDE
  3. 3.Max-Planck-Institute for Quantum Optics, Theory Group, 85748 Garching, GermanyDE

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