DIRECTIVE MULTI-CHANNEL BETA PROBE

摘要

PURPOSE: A directional multi-channel beta probe is provided to accurately check the position of a radiation source by removing a gamma noise that is a position resolution obstacle when a beta ray is detected. CONSTITUTION: An organic scintillator (10) is formed with an optical fiber type to easily detect a beta ray in comparison with a gamma ray. The organic scintillator emits a visible ray by reacting on the beta ray. A silicon photomultiplier (20) is connected to the organic scintillator and converts the visible ray from the organic scintillator to an electric signal. A reflector (30) is formed on the organic scintillator to transmit the visible ray to an optical sensor without a loss. The lateral side of the organic scintillator is shielded with lead to remove a gamma noise and an external visible ray.