Abstract EN:

AGATA is the European project for a 4π gamma-ray tracking array of Ge detectors and is expected to have a detection sensitivity three orders of magnitude larger than the presently in use gamma spectrometers. Tracking systems are working in position sensitive mode and the obtaining of a position resolution of a few millimeters through Pulse Shape Analysis (PSA) is essential. The aim of this Thesis is to develop and test a PSA method for AGATA. The gamma interactions in the Ge crystals are localized by decomposing the detector signal in a basis of reference signals, characterizing the crystal. The problem is reduced to a large system of linear equations, which is solved in the least-squares sense using mainly matrix inversion. We have tested out method using both simulated and experimental signals measured with a prototype AGATA capsule. We have obtained average positional erros of 1 - 2 mm with simulated single interactions, which shows that our method is well suited for its purpose.