Measuring surface distribution of emitted pref. radioactive radiation - indexing gp. of distributed detectors having same shutter aperture settings and sensitive to low radiation levels

摘要

The distribution measurement is effected via a group of detectors at a defined relative spacing. Each detector (16) receives radiation via a shutter with identical aperture settings. The detector group in a measuring head (10) is indexed relative to the scanned surface between individual measuring positions spaced according to the aperture setting or a multiple of the latter. The detector head is maintained in each measuring position for a defined measuring internal. Pref., the detector head is movable across the scanned surface in two orthogonal directions via perpendicular tracking rods. USE/ADVANTAGE - Radiographic thin-film chromatography. Genetic analysis of DNA fragments in get under effect of electric field for electrophoresis with separations, sorting and assembly according to radioactive markings. The radioactive isotopes used can be from beta or gamma radiators. Rapid, high resolution of weak radiations.