Localization of radioactive source using a network of small form factor CZT sensors

We present a small factor (0.5 cm${}^3$) CZT static sensor network consisted of a number of Non-Directional Detectors (NDD) capable to localize bare and lightly shielded radiation sources. The localization is performed with a fusion algorithm based on a fast analytical technique. The algorithm has been tested using simulated data and verified with experimental data from a static ${}^{137}$Cs source of 7 MBq. The localization accuracy of the order of 15 cm has been archived in 3D for bare sources and of the order of 20 cm in 2D for light shielded sources within a monitored volume of $5\text{m}\times 2.8\text{m}\times 2$ m.