Abstract
The “magic echoes” described by Waugh are shown to have a number of useful applications in the nuclear magnetic resonance of solids. These include lineshape analysis of free induction decays and high-resolution NMR in solids. The relevance of cycle symmetry in pulsed experiments is discussed briefly. In addition, it is demonstrated that the more familial echoes, namely, inhomogeneous spin echoes, may also manifest themselves in solid. Examples are given from the field of solid state 13C and 19F spectroscopy.
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