High resolution solid state NMR of quadrupolar nuclei

Dynamic Angle Spinning (DAS) and Double Rotation (DOR) solid state NMR are two new methods which have recently been applied to the study of elements with half‐integral quadrupolar spins. An increase in resolution is achieved over magic angle spinning (MAS) NMR by spinning the sample at two different angles, either sequentially (DAS), or simultaneously (DOR).