| 摘要 |
<p>An improved apparatus for detecting radioactive contamination in garments. The apparatus includes a pair of radiation detectors (34, 36) spaced along a conveyor path. The conveyor system conveys the garments in a compressed condition and the garments are biased toward each of the detectors (34, 36) as they are conveyed therepast. A housing (11) is provided with an air filtering system (50) such that the conveyors (10, 30) are enclosed in a ventilated structure and the spread of contaminants accumulating within the housing (1) is prevented. Preferably, the conveyors (10, 30) include a thin, open grid arrangement which is strong, non-stick, and includes an electrically conductive material which dissipates static charges. The detectors (34, 36) are gas-flow proportional and may be operated at a voltage optimized for sensing alpha particles. The detectors (34, 36) may also include plural zones (61, 62, 63, 64, 65, 66, 91, 92, 93), some of which are operated at a voltage optimized for sensing alpha particles, while others (96, 97, 98) are operated at a voltage optimized for sensing beta particles.</p> |
