ATTENUATION OF A HIGH-ENERGY NEUTRON FLUX IN THE SHIELD

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4125706

Komochkov, M M; Sychev, B S

The attenuation of a neutron flux in Fe was examined by using an approximation theory which satisfies the experimental data. The flux density and the neutron energy spectrum were determined by solving the kinetic equation for a monodirectional neutron flux which is perpendicularly incident on a semi-infinite absorber with respect to the boundary. The angilar deviation of the neutrons during their interaction with the nuclei was not taken into account; as a result of this, insufficient data were obtained concerning the space-energy distribution of the secondary particles for the case of the interaction of high-energy nucleons with the nuclei. Passage of the neutrons through the shield is defined by the most energetic component of the spectrum, deflected at small angles. The differential emission of cascade protons at E/sub p/ = 460 Mev was measured by using the derived equations. Determination of the dependence of the neutron flux formed by the bombardment of a Be target with 660-Mev protons on the thickness of a steel or iron shield showed that at thicknesses larger than 20 cm the theoretical and experimental data agree quite well; the theoretical andd experimental half-value attenuations, DELTA /sub 1/2/,were 15.9 plus or minus 0.6 and 16.5 plus or minus 1.3 cm, respectively. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-004686
• OSTI ID: 4125706
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ANGULAR DISTRIBUTION
BERYLLIUM
CASCADES
CONFIGURATION
DIFFERENTIAL EQUATIONS
DISTRIBUTION
EMISSION
ENERGY
ENERGY RANGE
EQUATIONS
INTERACTIONS
IRON
IRRADIATION
LOSSES
MEASURED VALUES
NEUTRON BEAMS
NEUTRON FLUX
NEUTRONS
NUCLEI
PHYSICS
PROTON BEAMS
PROTONS
SCATTERING
SHIELDING
SPECTRA
STEELS
TARGETS
THICKNESS