Exploring new aspects of spinning nuclei: from INGA to Gamma Tracking Array

The high-resolution gamma ray spectroscopy using large array of germanium detectors continues to play a pivotal role in the study of the atomic nuclei.   Indian National Gamma Array (INGA) is a powerful "femtoscope" for study of the structure of atomic nuclei at high spins. We will discuss some of the results on novel nuclear excitation modes and isomers from the experimental campaign of INGA coupled to a digital data acquisition system at BARC-TIFR Pelletron Linac Facility at TIFR, Mumbai. In addition, the need for electromagnetic moment measurements of the excited states will be highlighted. Major upgrade plan of the INGA to improve its detection capability will be presented. Looking further into the future, we will also talk briefly about the gamma-tracking array at FAIR (Facility for Antiproton and Ion Research) project and plans for Indian participation in this project.