Nuclear physics is a branch of physics that studies the atomic nucleus, its constituents, and the interactions governing them. The study of the nucleus incorporates both classical and quantum mechanical approaches, with the help of models such as the liquid-drop model and the nuclear shell model, respectively. Alternative theoretical frameworks, including the interacting boson model and ab initio methods, also contribute to understanding nuclear phenomena. Key areas of research in nuclear physics contain nuclear decay, radioactivity, and nucleosynthesis. Progress in this field has driven advancements in diverse applications, including nuclear medicine, nuclear energy, magnetic resonance imaging, radiocarbon dating, and nuclear weaponry. This book is compiled in such a manner that it will provide in-depth knowledge about the theory and practice of nuclear physics. Also included herein is a detailed explanation of the various concepts and applications of the discipline. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge