Effect of irradiation parameters on defect aggregation during thermal annealing of LiF irradiated with swift ions and electrons

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.82.144116· OSTI ID:21421453

Schwartz, K; Neumann, R; Trautmann, C ^[1]; Volkov, A E; Sorokin, M V ^[2]

---

1. GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstr. 1, 64291 Darmstadt (Germany)
2. Russian Research Center 'Kurchatov Institute', Kurchatov Square 1, 123182 Moscow (Russian Federation)

Absorption spectroscopy were performed to study the effects of thermal annealing on the aggregation of color centers in LiF crystals irradiated with different ions between carbon and uranium of megaelectron volt-gigaelectron volt energy. The beam parameters such as energy, energy loss, and fluence have a pronounced influence on the initial defect composition and concentration as well as their evolution upon thermal annealing. A distinct phenomenon was observed, viz., the enhancement of F{sub n} centers for annealing temperatures between 500 and 700 K, followed by Li colloid formation above 700 K. The phenomenon requires specific irradiation conditions whereas the formation of Mg colloids from Mg impurities occurs in all irradiated crystals. The mechanisms of annealing and colloid formation are discussed.

• OSTI ID: 21421453
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 14; Other Information: DOI: 10.1103/PhysRevB.82.144116; (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
ABSORPTION SPECTROSCOPY
AGGLOMERATION
ANNEALING
COLLOIDS
COLOR CENTERS
CRYSTAL DEFECTS
ELECTRON BEAMS
ENERGY LOSSES
GEV RANGE
HEAVY IONS
IMPURITIES
ION BEAMS
IRRADIATION
LITHIUM FLUORIDES
MEV RANGE
PHYSICAL RADIATION EFFECTS
TEMPERATURE RANGE 0400-1000 K
ALKALI METAL COMPOUNDS
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
DISPERSIONS
ENERGY RANGE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
IONS
LEPTON BEAMS
LITHIUM COMPOUNDS
LITHIUM HALIDES
LOSSES
PARTICLE BEAMS
POINT DEFECTS
RADIATION EFFECTS
SPECTROSCOPY
TEMPERATURE RANGE
VACANCIES