RADIOMETRIC ANALYSIS OF $beta$-ACTIVE GASES BY MEANS OF A SPHERICAL IONIZATION CHAMBER

Journal Article · Sat Jul 01 04:00:00 EDT 1961 · Atomnaya Energ.

OSTI ID:4843727

Turkin, A D

Internally filled ionization chambers are used at present for measuring the concentration of beta -active gases but the data obtained have only a qualitative significance because the correlation between the ionizing current and the activity of the gases in the chamber is not known. In order to study this question, a point source emitting beta -radiation was used, placing it in spherical chambers with radii of 5, construction material for every radius. The wall thickhess chosen was always larger than the maximum free path of the particles in the material. The sources used consisted of C/sup 14/, Co/sup 60/, Tl/sup 204/, Sr/sup 89/, Sr/sup 90/, and Y/sup 90/ deposited on a 12 mm diameter Al disk in thicknesses ranging from 15 to 20 microgram/cm/sup 2/. The activity of each source was determined with an average error of plus or minus 2%. During the tests the current was measured with an error of plus or minus 1.5% as a function of the location of source which was moved from the center toward the wall. From the relationship of the ionization current and the coordinates of the source, the correlation between the current and the activity of the gas can be easily determined. Under certain conditions the ratio I/QV (I = saturation current, B = concentration of gases, V = volume) is independent from the energy, making it possible to determine the concentration of a complex isotopic material by a simple measurement. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-027564
• OSTI ID: 4843727
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 11
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALUMINUM
BETA PARTICLES
CARBON 14
CHEMISTRY
COBALT 60
COPPER
DEPOSITS
GASES
IONIZATION
IONIZATION CHAMBERS
LEAD
MEASURED VALUES
PARTICLES
PLATES
RADIATION SOURCES
RADIOMETERS
STRONTIUM 89
STRONTIUM 90
THALLIUM 204
THERMAL RADIATION
THICKNESS
USES
VOLUME
YTTRIUM 90