| 摘要 |
An apparatus for measuring low radioactivities under industrial and field conditions by means of scintillation detectors, characterised in that it comprises three scintillation detectors (1) situated one next to the other in the measurement vessel (6) slot, in a dismountable lead shield (3) with a cover (4) that is opened in two directions, in which the scintillating crystals of the detectors operating in a coincidence system are separated with vertical lead plates (5).<IMAGE>
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