No.7（2004）11.A New Detection of Radon Water by Absorptive Plastic Scintillation Counting

Masaaki SAITO, Yoshiyuki TANIZAKI

  Polystyrene is the main component of plastic scintillator, and it absorbs radon as well as liquid aromatic solvents. A new radon monitor which detects radon distributed into plastic scintillator has been developed. A photomultiplier tube and plastic scintillator film were installed in a dark chamber, and radon water was introduced in the chamber. It was found that a scintillation spectrum of radon series was observed. Then the radon concentration in water could be measured by use of plastic scintillator as an absorbent of radon. This method, APS: Absorptive Plastic Scintillation counting, is useful as a continuous radon monitor for environmental research.

Keywords
Radon, Water, Plastic scintillator, Polystyrene, Monitoring

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