cross-polarisation magic angle spinning 13C cross-polarisation magic angle spinning 13C cross polarization magic angle spinning nuclear magnetic resonance spectroscopy carbon-13 cross-polarisation magic angle spinning 13C CP-MAS NMR 13C CP/MAS NMR A type of NMR spectroscopy using a solid sample. Anisotropic interactions between nuclei, which are usually averaged by Brownian motion in liquid samples, cause significant line broadening in solid state NMR, but can be averaged to zero by spinning the sample very rapidly at the magic angle (54.74° with respect to the direction of the magnetic field). Cross polarisation is used to enhance the signal from weakly coupled nuclei such as 13C nuclei. 13C CPMAS NMR 13C cross-polarization magic angle spinning nuclear magnetic resonance spectroscopy 13C cross polarisation magic angle spinning nuclear magnetic resonance spectroscopy 13C CP-MAS https://orcid.org/0000-0001-5985-7429 13C CP/MAS 13C CPMAS 13C cross polarisation magic angle spinning 13C cross polarization magic angle spinning 2009-06-03T03:51:05Z 13C cross-polarization magic angle spinning CHMO:0001916 13C cross-polarisation magic angle spinning nuclear magnetic resonance spectroscopy