Atomic and Molecular Spectroscopy : Basic Aspects and Practical Applications Introduction Atomic Structure Molecular Structure Radiation and Scattering Processes Spectroscopy of Inner Electrons. This textbook delivers a comprehensive review of modern spectroscopy encompassing a plethora of various X ray photoelectron optical and laser as well as radiofrequency and microwave spectroscopic techniques. On the fundamental side it focuses on physical principles and the impact of spectroscopy on our understanding of the building blocks of matter while in the area of applications particular attention is given to those in chemical analysis photochemistry surface characterization environmental and medical diagnostics remote sensing at short and long ranges and astrophysics. It features detailed discussion of laser cooling and trapping Bose–Einstein condensation ultra fast spectroscopy high power laser–matter interaction spectroscopy and imaging in astronomy and various spectroscopic aspects of laser medicine. This thoroughly updated and significantly expanded 5th edition of Svanberg’s Atomic and Molecular Spectroscopy includes a new section on the interplay of optical spectroscopy and multispectral imaging as well as new coverage of laser spectroscopic applications to cultural heritage monitoring ecology optical mammography and photoacoustic tomography. For newcomers to the field it introduces a new section on the fundamentals of quantum mechanics providing a brief primer to those students without formal experience in the subject. Based on the author’s 50 year career lecturing on spectroscopy and its interdisciplinary applications the book features over 100 chapter end questions and close to 3000 references offering a wealth of meticulously curated experience and pedagogical insight to graduate and advanced undergraduate students throughout physics chemistry biology and materials science.