COLLISION PROBABILITIES IN SUPERLATTICES

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · Kernenergie (East Germany)

OSTI ID:4631830

Kiesewetter, H

An infinitely expanding lattice of cylindrical rods is called a superlattice'' when the lattice squares are regular and are filled with rods that are distinguished from each other by their quality or their position. Superlattices originate, for example, from a regular rod lattice in which, in the regularly distributed lattice square, selected rods of the basic lattice are replaced by positioned or absorbing rods or by moderator (vacancies). For calculation of the spatial propagation of neutrons in a superlattice, the collision probabilities (for the first collision) of each rod type with respect to each other rod type and the moderator and of the moderator with respect to each rod type were used. These collision probabilities were approximately calculated for constant and nonconstant isotropic source distributions assumed in space on the basis of the transport theory. The approximation is that after each passage through a rod surface from the inside and from the outside the effective existing neutron distributions are replaced, using the isotropization method, by isotropic neutron distributions constant along the rod boundary. (tr-auth)

• Research Organization: VEB EPkA, Berlin
• NSA Number: NSA-17-036885
• OSTI ID: 4631830
• Journal Information: Kernenergie (East Germany), Journal Name: Kernenergie (East Germany) Vol. Vol: 6; ISSN KERNA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ABSORPTION
COLLISIONS
CONFIGURATION
CYLINDERS
DIFFUSION
DISTRIBUTION
MODERATORS
NEUTRON SOURCES
NEUTRONS
REACTOR CORE
REACTOR TECHNOLOGY
RODS
SURFACES
TRANSPORT THEORY