Warren, W. S. and Sinton, S. and Weitekamp, D. P. and Pines, A. (1979) Selective Excitation of Multiple-Quantum Coherence in Nuclear Magnetic Resonance. Physical Review Letters, 43 (24). pp. 1791-1794. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:WARprl79
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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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|Deposited On:||13 Jun 2008|
|Last Modified:||18 Sep 2014 18:11|
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