Computer based beta counting for simultaneous determination of radon and thoron progeny in air

摘要

A method employing defined solid angle absolute beta counting of filtered air samples, for simultaneous determination of concentrations of Radon and Thoron progeny in air, using end window GM counting system is implemented and used in the Department of Physics, Guru nanak Dev University (Amritsar). Using this PC based and relatively simple method, the equilibrium equivalent concentrations (EEC) of Radon and thoron was determined with less than 10% systematic errors. The details of the setup and the method of analysis are described.