Characterizing The Electron Response And Position Sensitivity For Radiation In Plastic Scintillators

To develop a tissue-equivalent dosimeter based on LET measurement, we examine the characteristics of a candidate material, plastic scintillators. The energy resolutions of plastic scintillators are examined by using the measured electron responses defined as the relative light output per unit energy of three plastic scintillators EJ-200, EJ-212, and EJ-252. The position sensitivity characteristic is examined by using a square-aligned plastic scintillator rod, and multi-segmented photomultiplier tubes are attached to both ends of the respective rod. The relation between signals from both end PMTs and the position of radiation incidence in the rod are obtained.