Foggy scintillation counting technique

A new "foggy scintillator" was developed for the measurement of low-energy beta-emitters in air. By the use of an ultrasonic wave generator, a liquid scintillator can be converted into the "foggy scintillator". In order to obtain reasonable detection efficiency, it is necessary to prepare a liquid scintillator with a very high concentration of the first solute (PPO). The foggy scintillation counting technique avoids the trouble of the sample preparation usually necessary for the measurement of radionuclides in air, since the radionuclide in the air can be measured directly.