LOW TEMPERATURE PROPERTIES OF NTD GE: BEST CHOICE FOR CUORE EXPERIMENT

A new series of NTD Ge thermistors has been produced by the Lawrence Berkeley National Laboratory in the framework of the CUORE (Cryogenic Underground Observatory for Rare Events) experiment. The electrical characteristics of the new materials have been measured at the Departement of Physics of the University of Florence. The goal of this study was the choice of the best type of thermistor to use in the CUORE experiment. We report also the electrical resistivity, electron specific heat and electron-phonon decoupling of the NTD31 Ge material selected for CUORICINO (single CUORE module, which has become operative at the end of 2002).