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Published December 10, 1979 | public
Journal Article Open

Selective Excitation of Multiple-Quantum Coherence in Nuclear Magnetic Resonance


Wideband selective n-quantum excitation in the NMR of coupled spins is demonstrated for the first time. By a combination of multiple pulse averaging and phase shifts ϕ a pure n-quantum excitation operator can be produced (n=2π / ϕ). This allows enhancement of normally weak n-quantum transitions. Selective excitation of the zero- and four-quantum transitions in benzene illustrates this approach. Extensions to selective absorption of only groups of n photons in other regimes of spectroscopy are straight-forward, in principle.

Additional Information

©1979 The American Physical Society. Received 24 September 1979. We thank G. Drobny, J. Murdoch, and J. Tang for illuminating discussions. One of us (W.S.W.) acknowledges receipt of a National Science Foundation Graduate Fellowship. This work was supported by the Division of Materials Sciences, Office of Basic Energy Sciences, under Contract No. W-7405-Eng-48.


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