Performance of a characteristic X-ray camera to identify contamination of radioactive cesium

The lightweight, high sensitivity and low-price camera to image Cs-137 contamination in environment has been developed. These three merits have not been realized by recent gamma cameras and Compton cameras. The camera images Cs-137 distribution by detecting the characteristic X-rays from it instead of gamma-rays. We have investigated the performance of the characteristic X-ray camera (CXRC) in detail and the specification is summarized.