INTERSTITIAL DEFECTS IN LiH AND NaCl IRRADIATED AT LOW TEMPERATURES

Journal Article · Sat Jul 15 04:00:00 EDT 1961 · Physical Review (U.S.) Superseded in part by Phys.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.123.464· OSTI ID:4002211

Pretzel, F E; Petty, R L

Expansions of the lattice parameters of both LiH and NaCl exposed to beta radiation at 77 and 245 deg K have been observed using a vacuum x-ray diffractometer stage operated at 77 deg K. The source of the beta radiation was 5.56% LiT contained in a LiH crystal which was ground and mixed with NaCl in the samples. The LiH lattice parameter increased 0.0020 plus or minus 0.0007 A in three samples. This result is consistent with density measurements and with the formation of interstitial He/sup 3/ atoms in the LiH lattice. The NaCl lattice parameter increased 0.0061 plus or minus 0.0009 A even though the average beta dose for the NaCl was less than 1% of that in the Li(H,T) and tritium beta particles with maximum energy cannot produce direct displacements in NaCl. A mechanism is proposed for the prcduction of Cl/sup -/ interstitials and vacancies (Frenkel defects) in NaCl which is similar to one proposed by Klick for the production of F and H centers. This mechanism is related to observations of the production of alpha centers in alkali halides irradiated at low temperatures. (auth)

• Research Organization: Los Alamos Scientific Lab., N. Mex.
• NSA Number: NSA-15-026625
• OSTI ID: 4002211
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 123; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKALI METALS
BETA PARTICLES
CHLORINE
CRYSTALS
DEFECTS
DENSITY
DIFFRACTION
EXPANSION
F CENTERS
FRENKEL DEFECTS
HALIDES
HELIUM 3
INTERSTITIALS
IONS
IRRADIATION
LATTICES
LITHIUM HYDRIDES
LOW TEMPERATURE
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
RADIATION EFFECTS
RADIATIONS
SODIUM CHLORIDES
TRITIUM
VACANCIES
VACUUM