ON THE MEASUREMENT OF THE DOSE OF GAMMA AND BETA RADIATION WITH THE AID OF THIMBLE IONIZATION CHAMBERS

Journal Article · Sun May 01 04:00:00 EDT 1960 · Izmeritel'naya Tekh.

OSTI ID:4166250

Smirnov, V V

The energy spectrum and angular distribution of secondary electrons was investigated using a magnetic spectrometer. Cs/sup 137/ and Co/sup 60/ sources were used. Targets of graphite, plexiglas, aluminum, copper, cadmium, and lead were constructed to simulate the walls of the thimble or airwall ionization chamber. Generally, the angular distribution showed a peak in the forward direction which became more pronounced as atomic number decreased. The number of secondary electrons formed was proportional to Z/A up to values of Z approximately equal to 30 for the Cs/sup 137/ source and 50 for the Co/sup 60/ source. At larger values of Z the number of secondary electrons rapidly increased due to photoelectric absorption of the gamma rays. The number of secondary electrons produced in the ionization chamber as a function of the plexiglas wall thickness was investigated. The number of secondary electrons became constant at approximately 1 mm for Cs/sup 137/ and 2.5 mm for Co/sup 60/. The experiments described were intended to further understanding of the processes occurring in gamma detectors. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-019162
• OSTI ID: 4166250
• Journal Information: Izmeritel'naya Tekh., Journal Name: Izmeritel'naya Tekh. Vol. Vol: No. 5
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ALUMINUM
ANGULAR DISTRIBUTION
ATOMIC NUMBER
ATOMS
BETA PARTICLES
CADMIUM
CESIUM 137
COBALT 60
COPPER
ELECTRIC CHARGES
ELECTRONS
ENGINEERING AND EQUIPMENT
GAMMA RADIATION
GRAPHITE
IONIZATION CHAMBERS
LEAD
MAGNETIC FIELDS
MEASURED VALUES
PHOTOELECTRIC EFFECT
PLEXIGLAS
POLYMERS
RADIATION DOSES
SPECTRA
SPECTROMETERS
SURFACES
TARGETS
THICKNESS