FLUX DISTRIBUTION AND CADMIUM RATIOS OF WATERMODERATED NEUTRONS PRODUCED BY THE LI7(P,N)BE7 REACTION
Abstract
Measurements were made of the flux distribution and cadmium ratios of water-moderated neutrons produced in a thick lithium target by the lithiumberyllium reaction. A 3-Mev Van de Graaff generator (model KN) was used as the source of high energy protons. The moderator consisted of a 1.0 x 1.25 x 1.5 ft aluminum tank with a water level maintained at 12 inches. Pure gold 1-mg samples were used as neutron detectors. The flux rose at the wall adjacent to the lithium target to a maximum value at one inch along the target axis; it then decreased at 2.5 inches from the target. Similar results were found along other axes, displaced vertically and horizontally from the target axis, though lower in magnitude. The cadmium ratio increased from 3.65 at the target wall to 8.8 at 1.8 inches, decreasing slightly to 6.7 at 2.5 inches, also along the target axis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1961
- Accession Number
- AD0265447
Entities
People
- E.a. Burke
- L.f. Lowe
Organizations
- Air Force Cambridge Research Laboratories