Apparent Velocity Threshold in the Electronic Stopping of Slow Hydrogen Ions in LiF

Journal Article · Fri Sep 09 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.113201· OSTI ID:20699418

Draxler, M; Chenakin, S P; Markin, S N; Bauer, P ^[1]

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1. Institut fuer Experimentalphysik, Johannes-Kepler Universitaet, Altenbergerstr. 69, A-4040 Linz (Austria)

The electronic energy loss of hydrogen ions (protons and deuterons) in thin supported films of LiF has been studied in backscattering geometry for specific energies from 700 eV/u to 700 keV/u, using Rutherford backscattering spectroscopy and time-of-flight low-energy ion scattering spectroscopy. For specific energies below 8 keV/u, our data confirm velocity proportionality for the stopping cross section {epsilon} (like in a metal) down to 3.8 keV/u, as observed previously for protons and antiprotons despite the large band gap (14 eV) of LiF. Below 3.8 keV/u, the present results indicate an apparent velocity threshold at about 0.1 a.u. for the onset of electronic stopping.

• OSTI ID: 20699418
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ANTIPROTONS
BACKSCATTERING
CROSS SECTIONS
DEUTERONS
ENERGY LOSSES
EV RANGE 100-1000
GEOMETRY
HYDROGEN IONS
KEV RANGE 01-10
LITHIUM FLUORIDES
RUTHERFORD BACKSCATTERING SPECTROSCOPY
STOPPING POWER
THIN FILMS
TIME-OF-FLIGHT METHOD
VELOCITY