AGATA: Performance of $γ$-ray tracking and associated algorithms

AGATA is a modern $γ$-ray spectrometer for in-beam nuclear structure studies, based on $γ$-ray tracking. Since more than a decade, it has been operated performing experimental physics campaigns in different international laboratories (LNL, GSI, GANIL). This paper reviews the obtained results concerning the performances of $γ$-ray tracking in AGATA and associated algorithms. We discuss $γ$-ray tracking and algorithms developed for AGATA. Then, we present performance results in terms of efficiency and peak-to-total for AGATA. The importance of the high effective angular resolution of $γ$-ray tracking arrays is emphasised, e.g. with respect to Doppler correction. Finally, we briefly touch upon the subject of $γ$-ray imaging and its connection to $γ$-ray tracking.