INFLUENCE OF F CENTERS ON THE LATTICE THERMAL CONDUCTIVITY IN LiF

Journal Article · Wed Jun 15 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.118.1499· OSTI ID:4188637

Pohl, R O

The influence of photochemically prcduced F centers in LiF on the thermal conductivity was investigated, the density of the F centers being determined optically. The F centers decreased the thermal conductivity appreciably at low temperatures. Additive coloration of KC1 had a similar effect. The experimental results were quite different from the results obtained in the case of the isotope effect in Ge. Callaway's theory for the lattice thermal conductivity in the presence of point defects did not explain the present observations satisfactorily, although it was superior to Klemens Two explanations were proposed: (1) The F centers were not randomly distributed (but the presence of clusters of F centers could be excluded in the experiments). (2) The long- range strain field around F center did not scatter like a point defect. In support of Callaway's theory, it was shown that his model could explain an experimental observation (first reported by Toxen) about the influence of point defects on the thermal conductivity. (auth)

• Research Organization: Cornell Univ., Ithaca, N.Y.
• NSA Number: NSA-14-018288
• OSTI ID: 4188637
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 118; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COLOR
DISTRIBUTION
EMISSION
FLUORINE
GERMANIUM
ISOTOPE EFFECTS
LATTICES
LIGHT
LITHIUM FLUORIDES
LOW TEMPERATURE
MEASURED VALUES
PHOTOCHEMISTRY
PHYSICS
POTASSIUM CHLORIDES
TEMPERATURE
THERMAL CONDUCTIVITY