Optimization of Detector Movement Algorithm Using Decision Trees Analysis for Radiation Source Identification Based on 4 pi Gamma Imaging

For accurate identification of radiation sources using 4 pi gamma imaging, the selection rule of measurement points around target sources was investigated. In a simple computational model of the 4 pi gamma imaging, the detector movement algorithm was optimized by decision trees analysis. According to the proposed algorithm, a Cs-137 point source was identified using a multi-pixel CdTe detector mounted on an unmanned vehicle as a prototype 4 pi gamma imager.