THE TEMPERATURE DEPENDENCE OF THERMAL NEUTRON DIFFUSION LENGTH IN GRAPHITE.
Abstract
The existence of the two classes of thermal neutrons about the Bragg cut-off in a crystalline structure has been experimentally verified by the use of dysprosium-aluminum wire detector. The space dependent neutron flux in a 24x24x48 inch rectangular parallelopiped graphite pile, GLC grade HC and density 1.60 gm/cc, has been investigated. At each temperature a distinct 'knuckle' or change of neutron distribution is readily apparent, although this degree of change decreases with increasing temperature because the neutron cross section below the Bragg cut-off increases with increasing temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1970
- Accession Number
- AD0709948
Entities
People
- Frederick Faber Touchstone Jr
Organizations
- Naval Postgraduate School