Analytical expressions and lineshape simulations for Levitt-Suter-Ernst composite-pulse quadrupolar echo sequences

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Abstract

Analytical expressions are derived for the Levitt-Suter-Emst composite quadrupolar echo sequences, allowing facile lineshape calculations for comparison with experiment. Large phase distortions in the lineshape obtained with the first-order sequence are significantly reduced with the second-order sequence. For 90° pulse lengths greater than ∼5μs, both sequences produce large phase errors for typical 2H quadrupolar coupling strengths in solids.

Original languageEnglish (US)
Pages (from-to)491-500
Number of pages10
JournalJournal of Magnetic Resonance (1969)
Volume67
Issue number3
DOIs
StatePublished - May 1986

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