ANGULAR DISTRIBUTION OF/cap beta/-RAYS FROM THICK-LAYER SOURCES

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Atomnaya Energ.

DOI:https://doi.org/10.1007/BF01476002· OSTI ID:4801749

Levochkin, F K; Sokolov, Yu Ya

The specific activity of materials may be measured by determining the yield of BETA -particles at the surface of a source with a thickness larger than the mean free path of the particles. This value is proportional to the specific activity and does not change with further increase of the thickness. Thls requires knowledge of the angular distribution of the particles. A method was developed involving the measurement of the absorption and scattering of the BETA -radiation from a point source placed between a thick support and foils of various thickness made of Al, Cu, Sn, and Pb. The measurements were carried out by means of a vacuum chamber and an end-window chamber, obtaining the angular distribution of the BETA -radiation of W/sup 185/, Tl/sup 204/, P/sup 32/, and Sr/sup 90/+ Y/sup 90/. Results showed that the angular distribution does not depend on the energy of the radiation and the atomic number of the source. The flux from the thick-layer source in the direction of the window may be computed by Lambert's formula, derived in 1892. (TTT)

• Research Organization: Originating Research Org. not identified
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-010983
• OSTI ID: 4801749
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ALUMINUM
ANGULAR DISTRIBUTION
BETA DETECTION
BETA PARTICLES
COPPER
DIFFUSION LENGTH
FOILS
LAYERS
LEAD
MEAN FREE PATH
MEASURED VALUES
PARTICLE SOURCES
PHOSPHORUS 32
PHYSICS
RADIOACTIVITY
SCATTERING
STRONTIUM 90
SURFACES
THALLIUM 204
THICKNESS
TIN
TUNGSTEN 185
VACUUM
WINDOWS
YTTRIUM 90