Si pixel detectors in the detection of EC/EC decay

The SPT collaboration has been investigating the applicability of pixel detectors in the detection of two neutrino double electron capture (2 nu EC/EC) in Cd-106. The collaboration has proposed a Silicon Pixel Telescope (SPT) where a pair of Si pixel detectors with enriched Cd foil in the middle forms the detection unit. The Pixel detector gives spatial information along with energy of the particle, thus helps to identify and remove the background signals. Four units of SPT prototype (using 0.5 and 1 mm Si sensors) were fabricated and installed in the LSM underground laboratory, France. Recent progress in the SPT experiment and preliminary results from background measurements are presented.