Spreading DANTE's wings: selective excitation of deuterium powder patterns

Abstract

2H NMR of static polycrystalline or amorphous solids often yields broad Pake powder patterns. These broad powder patterns arise from the orientation dependence of the second-rank quadrupolar Hamiltonian and the inherent orientational anisotropy of the sample. Here is presented an experiment that selectively excites a subset of the orientations of the quadrupolar Hamiltonian to give high-resolution spectra.