Accession Number : ADD001558

Title :   Selective Detector for Fission Neutrons.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Omohundro ,Robert J ; Marchetti,Frank A

Report Date : 12 Oct 1971

Pagination or Media Count : 5

Abstract : The invention distinguishes fissionable neutron sources from nonfissionable sources by using the principle that only a fissionable source emits simultaneously a plurality of neutrons during a single fission event. The simultaneously emitted neturons are counted in a first coincidence circuit together with random pulses from neutrons emitted by alpha,n reactions. A second coincidence circuit counts only those neutrons which were emitted separately at spaced intervals of time by alpha,n reactions and does so by including a delay device in one leg of the coincidence circuit to throw out of coincidence the pulses from the simultaneously emitted neutron.

Descriptors :   *Fission neutrons, *Neutron detectors, *Patents, Coincidence counting, Gates(Circuits)

Subject Categories : Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE