Method and apparatus for the noninvasive interrogation of object

Details Method and apparatus for the noninvasive interrogation of object Method and apparatus for the noninvasive interrogation of object

1988-01-11

1989-09-05

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

25039007, 25039002, 378 57, G01N 2320

Patent

active

048641421

ABSTRACT:
Neutron elastic scatter resonance is employed for the noninvasive interrogation of objects as for example to detect explosives and narcotics in closed containers. A resonant scattering spectrum of the object is obtained by projecting a collimated, monoenergetic beam of neutrons onto the object, varying the energy of the beam and measuring the scattered neutrons as a function of the beam energy. The thus generated spectra and analyzed so as to determine either the pressence of particular elements of interest or the relative ratios of those elements. Ratios so determined may be compared with corresponding ratios established for contraband items. If the ratios fall within the range for contraband, an alarm indication is provided. The present invention provides method and apparatus for contraband detection.

REFERENCES:
patent: 2567057 (1951-09-01), Crumrine
patent: 3146349 (1964-08-01), Jordan
patent: 3832545 (1974-08-01), Bartko
patent: 3997787 (1976-12-01), Fearon
patent: 4251726 (1981-02-01), Alvarez
patent: 4539648 (1985-09-01), Schatzki
Schrack et al., "Nuclear Fuel Assay Using Resonance Neutrons", Dimensions NBS, vol. 64, No. 4, May/Jun. 1980, pp. 21-23.

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