Abstract
The results of a theoretical investigation on double quantum coherence in pure nuclear quadrupole resonance (NQR) for spin I = 5 2 with axial symmetry in a single crystal are presented. Using the tensor operator formalism it is shown that the creation and detection of double quantum coherence can be done by the application of a pulse scheme of the form (π/2) x (2ω Q)(π) x (ω Q)-τ-(π) x (2ω Q). The effect of resonance off-set on the double quantum coherence is also considered.
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