A prototype of a portable TDCR system at ENEA

• New miniaturized TDCR device at ENEA-INMRI.
• Digital approach to the TDCR coincidence acquisition and analysis.
• 63Ni and 99Tc activity measurements.
• CAEN and ENEA off-line coincidence analysis software for TDCR measurements.
• TDCR first implementation of α/β pulse shape discrimination.

A prototype of a portable liquid scintillation counting system based on the Triple-to-Double Coincidence Ratio (TDCR) technique was developed at ENEA-INMRI in the framework of the European Metrofission project. The new device equipped with the CAEN digitizers was tested for the activity measurements of pure β-emitters (99Tc and 63Ni). The list-mode data recorded by the digitizers were analyzed by software implemented in the CERN ROOT environment, which allows the application of pulse shape discrimination using the new device.