Magic Angle Spinning (MAS) is a technique used in solid-state nuclear magnetic resonance (NMR) spectroscopy. It involves spinning a sample at a precise angle—54.74 degrees, known as the "magic angle"—relative to the direction of the magnetic field. This angle is significant because it averages out the anisotropic interactions, including the chemical shift anisotropy (CSA) and dipolar couplings, leading to high-resolution spectra similar to those obtained in liquid-state NMR.
