APPLICATION OF A CZT DETECTOR TO IN SITU ENVIRONMENTAL RADIOACTIVITY MEASUREMENT IN THE FUKUSHIMA AREA.

Instead of conventional Ge semiconductor detectors and NaI(Tl) scintillation spectrometers, an application of a CdZnTe semiconductor (CZT) whose crystal has the dimension of 1 cm cubic to the in situ environmental radioactivity measurement was attempted in deeply affected areas in Fukushima region. Results of deposition density on soil for Cs-134/Cs-137 obtained seemed consistent, comparing obtained results with those measured by the Japanese government.