Oxygen ion-induced detrapping of hydrogen retained in graphite

B. Tsuchiya, S. Nagata, Tatsuo Shikama

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The ion-induced re-emission of hydrogen isotopes (H and D) from graphite has been studied at room temperature with high energies of 2.0-4.8 MeV oxygen ions (O+) which penetrate through the H and D implanted region. The concentrations of H and D remaining in graphite during the ion bombardment were measured by an elastic recoil detection (ERD) technique using O+ ions. The re-emission rates of H and D from graphite increase with increasing the incident energy of the O+ ion bombardment. The re-emission rate of H at low O+ ion fluence is larger than that of D. The O + ion-induced detrapping cross-sections evaluated from mass balance equations for H and D are independent of the incident energy and have no isotope effect. The results indicate that the electron excitation by the O + ion bombardment in the incident energy range of MeV plays an important roll for the detrapping of H and D.

Original languageEnglish
Pages (from-to)426-430
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume212
Issue number1-4
DOIs
Publication statusPublished - 2003 Dec
EventAtomic Collisions in Solids - India, India
Duration: 2003 Jan 192003 Jan 24

Keywords

  • Elastic recoil detection
  • Hydrogen isotopes
  • Ion-induced detrapping
  • Mass balance equation
  • Oxygen ion

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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