Particle Detectors: (4.1) (5) Gamma-Ray Path Reconstructing Algorithm: Reconstructing the path of the γ-ray interaction is one of the main problems of the γ-ray tracking. There are several proposed methods for constructing the path of the γ-ray and two of them are dominating: the back tracking algorithm and clusterisation. The tracking performance is quite sensitive depending on the choice of the formula for the figure-of-merit so; different figures-of-merit have investigated in detail. The influence of the initial momentum of the Compton scattering on the reconstruction results are need to be investigated. AGATA is the most efficient γ-ray tracking array ever developed and position sensitive Ge-detectors are the main concept for this. It is mentionable that the Composite Ge detectors were first developed for the EUROGAM spectrometer and it has been used many standard applications. The Encapsulated Ge detectors were developed for the EUROBALL spectrometer. The Segmented techniques are the latest of their combination and are used in AGATA