Detection of concealed materials

Details Detection of concealed materials Detection of concealed materials

1980-07-15

1985-01-15

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

2503601, G01N 2300

Patent

active

044940017

ABSTRACT:
A hand portable probe 11 contains a radioactive source capsule 16 of low energy .gamma. rays which penetrate into an object against which the probe is positioned. Backscattered .gamma. radiation is detected by an annular radiation detector array 14 positioned to be in contact with or very close to the surface under examination. Materials of low atomic number exhibit low photoelectric absorption and can be detected even when concealed behind steel.

REFERENCES:
patent: 3068359 (1962-12-01), Carlson
patent: 3928765 (1975-12-01), Teller
patent: 4243884 (1981-01-01), Avera, Jr.

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