Method of determining the distance between area under fire and t

Details Method of determining the distance between area under fire and t Method of determining the distance between area under fire and t

1974-03-25

1976-01-13

Willis, Davis L.

Radiant energy

Radiation tracer methods

Radioactive tracer methods

73167, 250395, G21H 502

Patent

active

039327485

ABSTRACT:
Method of determining the distance between an area under fire and the muzzle of the weapon by means of autoradiography of the irradiated firing residues on this area. Several carrier areas are fired at from various distances. The carrier areas are subsequently activated by neutron irradiation and subsequently contacted with a film sensitive to nuclear radiation. The series of autoradiographs produced after development on the film are compared with the autoradiograph, produced in the same way, of the firing trace to be investigated on the area fired at and used as a distance standard for that trace.

REFERENCES:
patent: 3766778 (1973-10-01), Henrichsen
"Analysis by Neutrons Aids Crime Solution," The Washington Post, Feb. 24, 1962.

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