Performance assessment by Monte Carlo simulations of a prospective assembly of up to three HPGe detectors designed for superior detection efficiency and sensitivity

The present work reports on the results of Monte Carlo simulations performed with MCNP on an assembly of two HPGe detectors facing each other regarding detector efficiencies. Report is also made when a third detector is added to the previous configuration from below. Moreover cross talk between detectors is investigated and found of limited impact. The choice for an actual detector goes to the three detector configuration for accommodating most geometries while cost and engineering constrains remain acceptable. - Highlights: ► Gain is doubled in FEP efficiency for twin detectors for most sample geometries. ► Gain is less than threefold in configurations of three detectors. ► Cross talk between detectors is small. ► Detection sensitivity is increased as FEP efficiency.