Accession Number : AD0265447

Title :   FLUX DISTRIBUTION AND CADMIUM RATIOS OF WATERMODERATED NEUTRONS PRODUCED BY THE LI7(P,N)BE7 REACTION

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : LOWE,L.F. ; BURKE,E.A.

Report Date : JUL 1961

Pagination or Media Count : 1

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)

Descriptors :   *HOMOGENEOUS REACTORS, *NEUTRONS, ALUMINUM, ARGON, BERYLLIUM, GOLD, LITHIUM, MEASUREMENT, NEUTRON FLUX, NUCLEAR PHYSICS, PARTICLE ACCELERATORS, PROTON BOMBARDMENT, PROTONS, SHEETS, TARGETS, VAN DE GRAAFF GENERATORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE