INSTRUMENT FOR MEASURING LEVELS OF CONCENTRATION OF TRITIUM AND TRITIUM OXIDES IN AIR

摘要

ABSTRACTAn instrument for measuring levels of concentration of tritium andtritium oxides in environmental air includes a scintillationdetector, such as a photomultiplier, and a controlled device forexposing scintillators to the detector in succession. Air beingmonitored is passed over the scintillators. A thermoelectricdevice is used to cool and warm one of the scintillators forcondensing air moisture onto its surface and for evaporatingmoisture from it, the count rate being measured in both instances.The other scintillator is a reference scintillator, the count ratefrom which is also measured, and a measurement is taken withneither of the scintillators exposed to the scintillationdetector. The concentration levels of tritium and tritium oxidesare computed from the set of measurements.