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Electron-Stimulated Hydrogen Desorption from Nickel and Palladium

  • Yu. I. Tyurin
  • I. P. Chernov
  • V. M. Silkin
  • V. S. Sypchenko
  • A. M. Hashhash
  • N. N. Nikitenkov
  • N. D. Tolmacheva
Article

Abstract

New experimental data are presented on the radiation-stimulated diffusion of hydrogen in metals, in particular, nickel and palladium, under the action of a 30-keV accelerated electron beam. Hydrogen desorption rates from nickel and palladium are determined for thermal and electron beam heating; a substantial shift of the thermal gas-desorption peaks to the low-temperature range is detected upon radiationinduced heating. The presence of an internal hydrogen atmosphere is shown to create favorable conditions for the vibrational-translational exchange (VT exchange), non-equilibrium redistribution, and desorption of hydrogen from a solid upon irradiation. Accelerated hydrogen migration stimulated by electrons with an energy below the defect-formation threshold is explained at a qualitative level. First-principles calculations of the electronic structure of the metal–hydrogen system reveal that plasmons are also an efficient mechanism for radiation-energy dissipation over the whole crystal.

Keywords

hydrogen nickel palladium thermal- and radiation-stimulated gas desorption first-principles calculations plasmons 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Yu. I. Tyurin
    • 1
  • I. P. Chernov
    • 1
  • V. M. Silkin
    • 1
  • V. S. Sypchenko
    • 1
  • A. M. Hashhash
    • 2
  • N. N. Nikitenkov
    • 1
  • N. D. Tolmacheva
    • 1
  1. 1.National Research Tomsk Polytechnic UniversityTomskRussia
  2. 2.Institute of Atomic EnergyNational Research CenterCairoEgypt

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