Pyramidal pits created by single highly charged ions in BaF{sub 2} single crystals

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.82.033403· OSTI ID:21386916

El-Said, A S ^[1]; Heller, R; Facsko, S ^[1]; Aumayr, F ^[2]

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1. Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden (Germany)
2. Institute of Applied Physics, Vienna University of Technology, 1040 Vienna (Austria)

In various insulators, the impact of individual slow highly charged ions (eV-keV) creates surface nanostructures, whose size depends on the deposited potential energy. Here we report on the damage created on a cleaved BaF{sub 2} (111) surface by irradiation with 4.5xq keV highly charged xenon ions from a room-temperature electron-beam ion trap. Up to charge states q=36, no surface topographic changes on the BaF{sub 2} surface are observed by scanning force microscopy. The hidden stored damage, however, can be made visible using the technique of selective chemical etching. Each individual ion impact develops into a pyramidal etch pits, as can be concluded from a comparison of the areal density of observed etch pits with the applied ion fluence (typically 10{sup 8} ions/cm{sup 2}). The dimensional analysis of the measured pits reveals the significance of the deposited potential energy in the creation of lattice distortions/defects in BaF{sub 2}.

• OSTI ID: 21386916
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevB.82.033403; (c) 2010 The American Physical Society; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM FLUORIDES
CHARGE STATES
COMPARATIVE EVALUATIONS
CRYSTAL DEFECTS
DENSITY
ELECTRON BEAMS
ETCHING
IRRADIATION
KEV RANGE
MONOCRYSTALS
MULTICHARGED IONS
NANOSTRUCTURES
PHYSICAL RADIATION EFFECTS
POTENTIAL ENERGY
SPECTROSCOPY
SURFACES
TEMPERATURE RANGE 0273-0400 K
TRAPS
XENON IONS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
CRYSTALS
ENERGY
ENERGY RANGE
EVALUATION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONS
LEPTON BEAMS
PARTICLE BEAMS
PHYSICAL PROPERTIES
RADIATION EFFECTS
SURFACE FINISHING
TEMPERATURE RANGE