High efficiency fast neutron threshold deflector

Details High efficiency fast neutron threshold deflector High efficiency fast neutron threshold deflector

1990-08-01

1992-01-07

Hunt, Brooks H.

Induced nuclear reactions: processes, systems, and elements

Detection of radiation by an induced nuclear reaction

By fission

376255, 376155, 250392, G01T 300

Patent

active

050789511

ABSTRACT:
A high-efficiency apparatus for detecting fast neutrons includes an assembly of disks of solid state charged particle detector material, or other appropriate charged particle detecting devices, disposed between adjacent thick (on the order of 1 mm) disks of fissionable material. The fissionable material must be an isotope that has a sharp increase in the neutron-induced fission cross section at a neutron energy of about 100 keV or greater, i.e., a fast neutron. An array of such assemblies housed in a thermal neutron shielding structure provides a threshold detector for fast neutrons resulting from neutron-induced fission of the fissionable material.

REFERENCES:
patent: 2809313 (1957-10-01), Baer et al.
patent: 3598996 (1971-08-01), Haebler et al.
patent: 4410483 (1983-10-01), Tomoda
patent: 4927593 (1990-05-01), Impink, Jr. et al.
Glenn F. Knoll; Radiation Detection and Measurement; 1970; Chapter 15, Fast ission Detection and Spectroscopy, pp. 562-570.

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