Controlling coherence using the internal structure of hard pi pulses

The tiny difference between hard pi pulses and their delta-function approximation can be exploited to control coherence. Variants on the magic echo that work despite a large spread in resonance offsets are demonstrated using the zeroth- and first-order average Hamiltonian terms, for 13C NMR in 60C....

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Bibliographic Details
Published inPhysical review letters Vol. 100; no. 24; p. 247601
Main Authors Dong, Yanqun, Ramos, R G, Li, Dale, Barrett, S E
Format Journal Article
LanguageEnglish
Published United States 20.06.2008
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Summary:The tiny difference between hard pi pulses and their delta-function approximation can be exploited to control coherence. Variants on the magic echo that work despite a large spread in resonance offsets are demonstrated using the zeroth- and first-order average Hamiltonian terms, for 13C NMR in 60C. The 29Si NMR linewidth of silicon has been reduced by a factor of about 70,00 using this approach, which also has potential applications in magnetic resonance microscopy and imaging of solids.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.100.247601