A VERSATILE COBALT-60 SAMPLE IRRADIATION UNIT. SOME DESIGN FEATURES AND DOSE MEASUREMENTS

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · Physics in Medicine and Biology (England)

DOI:https://doi.org/10.1088/0031-9155/8/3/302· OSTI ID:4631268

Brownell, G L; Stratton, K; Pinter, J L

The design of a 5000-C double-well Co/sup 60/ irradiation unit is described. The 5-in. dia x 8-in. high irradiation volume enclosed by the cylindrical source has access tubes for electrical and fluid connections to the sample during irradiation. The upper Pb shield and the source are motordriven. Operation is either by manual or fully automatic control. Dose measurements were made with an Al absorbed dose calorimeter and with the ferrous-ferric system. They give 7.80 plus or minus 0.12 x 10/sup 5/ rad/hr in water (December, 1961) for the dose rate at the center of the irradiation volume. The spatial dose distribution within the irradiation chamber was mapped using a Plexiglas (polymethylmethacrylate) dosimeter. Results of calibration of the radiation- induced optical absorption at 370 m mu against the ferrous-ferric system showed that the plastic dosimeter was linear with dose of Co/sup 60/ gamma rays up to 1.2 x 10/sup 6/ rads. (auth)

• Research Organization: Massachusetts General Hospital, Boston
• NSA Number: NSA-17-037031
• OSTI ID: 4631268
• Journal Information: Physics in Medicine and Biology (England), Journal Name: Physics in Medicine and Biology (England) Vol. Vol: 8; ISSN PHMBA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
COBALT 60
DISTRIBUTION
DOSEMETERS
GAMMA RADIATION
GAMMA SOURCES
MEASURED VALUES
PLANNING
PLEXIGLAS
POLYMERS
RADIATION DOSES
RADIOTHERAPY
STANDARDS
USES