Thermal-annealing studies of defects in lithium fluoride after electron-beam irradiation
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Institut fuer Allgemeine Physik, Technische Universitaet Wien, Wiedner Hauptstrasse 8-10, A-1040 Wien, Austria (AT)
We have bombarded single-crystal LiF surfaces with 400-eV electrons at fixed target temperatures between 330 and 470 K and varied the irradiation time between 30 and 4200 sec. After irradiation we heated the crystals up to 750 K and simultaneously recorded the Li desorption. Interpreting the amount of desorbed Li atoms as a measure for frozen electron-center defects and Li agglomerates in the crystal, we were able to obtain an activation energy for the thermal migration of the {ital H} centers of about 0.13 eV. Investigations, where the bombarding time has been varied, indicate efficient {ital H}-center trapping processes and different lifetimes for {ital H}-center clusters of different sizes in the crystal. In addition, we found evidence for a substantial formation of {ital F}-center agglomerates under the surface and Li islands on the surface.
- OSTI ID:
- 5751668
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:8; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METAL COMPOUNDS
ALKALI METALS
ANNEALING
ATOMS
COLLISIONS
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DESORPTION
ELECTRON COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUORIDES
FLUORINE COMPOUNDS
H CENTERS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
LITHIUM
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
METALS
MONOCRYSTALS
POINT DEFECTS
VACANCIES
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METAL COMPOUNDS
ALKALI METALS
ANNEALING
ATOMS
COLLISIONS
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DESORPTION
ELECTRON COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUORIDES
FLUORINE COMPOUNDS
H CENTERS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
LITHIUM
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
METALS
MONOCRYSTALS
POINT DEFECTS
VACANCIES