Radiation scanning and measuring device.

摘要

A scanning device for examining an object with shielding (43,44) for protection from radiation and protection of the mechanism from heat by a cooling jacket (62,63) formed by spaced plates (64,65,66,67) around the object (10). The shielding is formed by a pair of shutter-halves (43,44) forming a lead shutter with mechanism (45) to move the shutter-halves toward and away from each other and one of the shutter-halves mounted on a rotating drum (17) which also carries three gamma ray sources (25). Gamma ray detectors (41) are mounted in a circle concentric and outside the circle of the sources (25).