METHODS AND APPARATUS FOR MONITORING SIMULTANEOUSLY TWO ENERGY LEVELS OF RADIOACTIVITY IN A GAS

摘要

Method and apparatus for detecting, distinguishing and indicating low-level activity of radioactive gases, such as tritium and/or krypton-85, in a selected gas, even in the presence of electronegative gases. The apparatus consists of a detection chamber of a type which is energy selective through inclusion of plural ionization collector circuits providing two separate detector outputs. The two detector outputs are applied then to parallel signal processing channels which serve to separate detected energy through pulse amplitude discrimination and/or coincidence selection to determine absolute quantities of radioactive events for selected contaminants in the gas sample.