THERMOLUMINESCENCE STUDIES OF THE GAMMA-RAY IRRADIATED FERROELECTRICS ROCHELLE SALT AND GUANIDINE ALUMINUM SULFATE HEXAHYDRATE

Journal Article · Sun Apr 01 04:00:00 EST 1962 · Phys. and Chem. Solids

DOI:https://doi.org/10.1016/0022-3697(62)90104-X· OSTI ID:4825861

Gilliland, Jr, J W; Yockey, H P

Samples of Rochelle salt and guanidine aluminum sulfate hexahydrate were irradiated with Co/sup 60/ gamma rays up to 3.5 x 10/sup 6/ r at liquid nitrogen temperature, after which they were warmed at a constant rate and observed with a photomultiplier tube. The grade Rochelle salt powder was found to produce a glow peak at about -61 deg C, corresponding to a trap depth of about 0.42 ev, which was removed completely by two recrystallizations from water solution. Rochelle salt single crystals also yielded no detectable thermoluminescence, indicating a maximum trap concentration significantly less than 10/sup 6/ per gram. Guanidine aluminum sulfate hexahydrate showed three glow peaks, at - 146, -119, and about - 5 deg C, corresponding to trap depths of 0.25, 0.31, and 0.54 ev respectively. The major peak at -146 deg C became more prominent as the dose was increased to 3.5 x 10/sup 6/ r At low doses (10,000 r) the -119 deg C peak was largest but became completely concealed by the lower temperature peak at 3.5 x 10/sup 6/ r. The low and very broad peak at -5 deg C was most easily seen at intermediate doses of 10/sup 5/ and 10/sup 6/ r, becoming undetectable at lower doses and becoming poorly resolved at higher doses. Trap concentration for an exposure of 3.5 x 10/sup 6/ r was estimated to be 7 x 10/sup 9/ per gram. (auth)

• Research Organization: Vanderbilt Univ., Nashville
• NSA Number: NSA-16-022672
• OSTI ID: 4825861
• Journal Information: Phys. and Chem. Solids, Journal Name: Phys. and Chem. Solids Vol. Vol: 23
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM SULFATES
COBALT 60
ENERGY LEVELS
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
GAMMA RADIATION
GAMMA SOURCES
GUANIDINE
HEATING
IRRADIATION
LOW TEMPERATURE
LUMINESCENCE
METALS, CERAMICS, AND OTHER MATERIALS
ORGANIC ACIDS
PHOTOMULTIPLIERS
POTASSIUM COMPOUNDS
POWDERS
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
RECRYSTALLIZATION
RESOLUTION
SODIUM COMPOUNDS
SOLUTIONS
TARTARIC ACID
TEMPERATURE
THERMOLUMINESCENCE
TRAPS
WATER