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 ob tain reasonable detection efficiency, it is necessary to prepare a liquid s cintillator with a very high concentration of the first solute (PPO). The f oggy scintillation counting technique avoids the trouble of the sample prep aration usually necessary for the measurement of radionuclides in air, sinc e the radionuclide in the air can be measured directly. (C) 2001 Elsevier S cience Ltd. All rights reserved.