CHANGES IN COLOR AND ELECTRIC CHARACTERISTICS OF GAMMA-RAY IRRADIATED SHIELDING WINDOW GLASS

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Tokyo Metropolitan Isotope Centre Ann. Rept.

OSTI ID:4639314

Yamamoto, K; Tsuchiya, M

The coloration of shielding window glass of various kinds by gamma irradiation was studied. With Co/sup 60/ as the radiation source, 23 plus or minus 3 deg C as irradiation temperature, 10/sup 5/ r/h as irradiation dose rate, and 10/sup 5/--10/sup 7/ r as total dose, the coloration increased gradually. The volume resistivity of glass and its change by gamma irradiation were measured. 100 v were applied to a sheet of glass sandwiched between two electrodes to measure the time change of its electric resistance. The quantity of induced space charge by radiation was calculated by time integration of the current that was obtained from the reciprocal of the resistance. Resistance of high density glass was found to become minimum--hence, the current becomes maximum --at 10/sup 6/ r and increased as the dose increased, but the resistance of medium density glass decreased gradually. The resistance change is exponential and always positive at any dose. This testifies that glass is electretized by radiation. On the other hand, linearity was established between the quantity of space charge and the dose in a range of 10/sup 5/-4 x 10/sup 6/ r. This suggests the possibility of the high density glass to be utilized for dosimetry. (P.C.H.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-036364
• OSTI ID: 4639314
• Journal Information: Tokyo Metropolitan Isotope Centre Ann. Rept., Journal Name: Tokyo Metropolitan Isotope Centre Ann. Rept. Vol. Vol: 1
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

COBALT 60
COLOR
CURRENTS
DENSITY
DOSEMETERS
ELECTRIC CONDUCTIVITY
ELECTRICITY
ELECTRODES
GAMMA RADIATION
GLASS
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
NUMERICALS
RADIATION DOSES
RADIATION SOURCES
SHEETS
SHIELDING MATERIALS
TEMPERATURE
USES
VARIATIONS