INSTALLATION FOR THE CALIBRATION OF RADIATION SOURCES BY THE CAVITY CHAMBER METHOD

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Acad. Rep. Populare romine, Studii Cercetari Fiz.

OSTI ID:4757136

Cohen, J; Oncescu, M

Cavity-type ionization chambers were used for calibrating the gamma - emission of certain radionuclides. The method which represents a generalization of the free-air chamber, is based on the Brag-Gray relation prevailing between the energy delivered by a beam of x ray's or gamma rays in a medium and the energy lost by the secondar), electrons generated in a gas cavity; it may be used in the energy range from 300 kev to 3 Mev. In order to increase the accuracy of the method, the temperature of the room used for the measurements was kept constant within 0.1 deg C. An electrometer with a vibratory condenser, serving as a zero indicator, was used for the measurement of the ionization current. The nonlinearity of the system was found to be less than 2.5%. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-014654
• OSTI ID: 4757136
• Journal Information: Acad. Rep. Populare romine, Studii Cercetari Fiz., Journal Name: Acad. Rep. Populare romine, Studii Cercetari Fiz. Vol. Vol: 13
• Country of Publication: Country unknown/Code not available
• Language: Rumanian

Related Subjects

CAPACITORS
ELECTROMETERS
ELECTRONS
ENERGY
GAMMA RADIATION
GAMMA SOURCES
INSTRUMENTS AND INSTRUMENTATION
IONIZATION CHAMBERS
MEASURED VALUES
RADIATION SOURCES
RADIOISOTOPES
TEMPERATURE
X RADIATION