Lecture
This lecture covers the principles of spin echoes and coherence transfer in NMR spectroscopy. It explains the concept of spin precession, the formation of spin echoes, and the refocusing of magnetization. The product operator formalism is used to describe the evolution of coupled spin systems. The lecture also discusses the INEPT experiment, which enhances the sensitivity of low-gamma nuclei by transferring polarization from high-gamma nuclei. Multiple-pulse NMR spectroscopy and the measurement of longitudinal and transverse relaxation rates are explored. The importance of understanding quantum-mechanical vector descriptions in NMR is emphasized.