RADIATION DAMAGE STUDIES IN SOLIDS NUCLEAR RESONANCE ABSORPTION TECHNIQUE. Period covered: January 1, 1958 through October 31, 1958

Technical Report · Mon Dec 01 04:00:00 EST 1958

DOI:https://doi.org/10.2172/4296959· OSTI ID:4296959

Bray, P J

Nuclear magnetic resonance (NMR) studies of neutron-irradiated LiF crystals have resulted in the detection of colloidal lithium metal and molecular fluorine gas. Quantitative determinations of the amount of damage and the behavior of the displaced metal and halide ions appear to be possible. The defect density in neutron-irradiated KBr has been checked as a function of dosage and annealing time. A low-intensity satellite on the low-frequency side of the normal bromine NMR in unirradiated KBr has been detected and studied as a function of the magnitude and orientation of the magnetic field. Second-order quadrupolar effects arising from the strain fields of dislocations are probably responsible for the effect. Experimental and theoretical studies of the preferential orientation of dislocations in single crystals of NaI and KI have progressed. With increased spectrometer sensitivity which detects the broad wings on the I/sup 127/ NMR, integrated line intensities are now more meaningful. NMR studies of proton-irradiated (160 Mev) crystals of Nal, RbI, RbBr, CsI, CsBr and other alkali halides were started. The Li/sup 7/ and B/sup 11/ resonances in Li/sub 2/O-B/sub 2/O/sub 3/ glasses were studied as a function of the glass composition. Departures from the behavior of the Na/sub 2/O-B/sub 2/O/sub 3/ system are noted. The Li/sup 7/ resonance displays satellite transitions arising from nuclei with electrical quadrupole coupling constants of an average value of 187 kc. Neutron radiation damage has been detected in the Li/sub 2/O-B/sub 2/O/ sub 3/ glasses by NMR techniques. Gamma ray radiation effects in hexamethylenetetramine reveal a hyperbolic tangent dependence on radiation dosage and emphasize the importance of recombination processes in molecular solids. (auth)

• Research Organization: Brown Univ., Providence
• NSA Number: NSA-13-008208
• OSTI ID: 4296959
• Report Number(s): NYO-7625
• Country of Publication: United States
• Language: English

Related Subjects

ALKALI METALS
ALKENES
AMINES
ANNEALING
BORON 11
BORON OXIDES
CESIUM BROMIDES
CESIUM IODIDES
COLLOIDS
CRYSTALS
DEFECTS
DISLOCATIONS
FLUORINE
GAMMA RADIATION
GLASS
HALIDES
IODINE 127
ION RECOMBINATION
LITHIUM
LITHIUM 7
LITHIUM FLUORIDES
LITHIUM OXIDES
METHYL RADICALS
METHYLENE
MONOCRYSTALS
NEUTRONS
NUCLEAR MAGNETIC RESONANCE
POTASSIUM BROMIDES
POTASSIUM IODIDES
PROTON BEAMS
RADIATION DOSES
RADIATION EFFECTS
RADIATION EFFECTS ON MATERIALS
RUBIDIUM BROMIDES
RUBIDIUM IODIDES
SODIUM IODIDES
SODIUM OXIDES
SOLIDS