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Article Dans Une Revue Bo Pu Xue Za Zhi Année : 2015

H broadband excitation by average Hamiltonian theory.

M. Shen
  • Fonction : Auteur
R. Roopchand
  • Fonction : Auteur
E. S. Mananga
  • Fonction : Auteur
Q. Chen
  • Fonction : Auteur
G. S. Boutis
  • Fonction : Auteur
B. Hu
  • Fonction : Auteur


Quadrupolar echo NMR spectroscopy of solids often requires RF pulse excitation that covers spectral widths exceeding 100 kHz. In a recent work we found out that a four pulse, composite pulse COM-II ( [Formula: see text] ), provided robust broadband excitation for deuterium quadrupolar echo spectroscopy. Moreover, when combined with an eight step phase cycle, spectral distortions arising from finite pulse widths were greatly supressed. In this paper we report on a theoretical analysis COM-II with 8-step phase cycle by average Hamiltonian theory. This treatment is combined with the fictitious spin-1 operator formalism, and the mechanism of the 8-step phase cycling that minimizes the spectral distortions is discussed.


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Dates et versions

hal-04398696 , version 1 (16-01-2024)



M. Shen, R. Roopchand, E. S. Mananga, Jean-Paul Amoureux, Q. Chen, et al.. H broadband excitation by average Hamiltonian theory.. Bo Pu Xue Za Zhi, 2015, Bo Pu Xue Za Zhi, 32, pp.373-381. ⟨10.11938/cjmr20150219⟩. ⟨hal-04398696⟩
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