DETERMINATION OF THE BUILDUP FACTOR FOR BARRIER GEOMETRY

Journal Article · Fri Mar 01 04:00:00 EST 1963 · At. Energ. (USSR)

OSTI ID:4713093

Kimel, L R

Tabulations of numerical values of the coefficients appearing in the formula which determine the buildup factor, while taking into account the effect of multiple scattering, are available for various gamma -energy levels and for several different shielding materials. The formulas refer to ideal cases, but in actual calculations instead of infinite media shielding barriers of a finite thickness must be used. This makes it necessary to make use of a correction factor when recalculating ihe numerical values derived for an infinite medium. Attempts to express this factor as a sum of two exponents did not yield satisfactory results. The ratio of the buildup factors for barrier geometry and for an infinite medium were assumed to be constant, without reducing the precision of the calculations. It was thus possible to use the buildup factor calculated for infinite medium for calculating the dose from large sources placed behind a shield. The values of these coefficients for water and iron are presented in a tabular form; they may be used advantageously for calculations involving isotopic point sources. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-022767
• OSTI ID: 4713093
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 14
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
BARRIERS
BUILDUP
CONFIGURATION
ENERGY LEVELS
ERRORS
GAMMA RADIATION
GAMMA SOURCES
IRON
NUMERICALS
PHYSICS
RADIATIONS
SCATTERING
SHIELDING
SHIELDING MATERIALS
TABLES
THICKNESS
WATER