This book contains different exciting structural phenomenon in weakly deformed nuclei (i.e the nuclei where the neutron or proton number close to shell closure). The detailed gamma ray spectroscopy technique which includes how to measure spin and parity of the exciting states as well as to measaure the lifetimes of these states with picoseconds order are described in this book. This book will be helpful for those who start their research carrier with gamma ray spectroscopy.

This book deals with the details of the new generation Clover Detector which will be useful to extract information about gamma rays emitted from the excited Co-60 and Eu-152 source in the laboratory. The method of Compton suppression using the co-incidence technique in order to reduce the noise in the spectra and the add-back feature of the clover detector and its efficiency are lucidly discussed in the text. The polarisation method in order to get information about the electric/magnetic nature of the gamma rays emitted from the radioactive source is also discussed.