A1 Refereed original research article in a scientific journal
Five quantum coherence of I=5/2 nuclei: Al-27 in polycrystalline AlCl3
Authors: Kaikkonen A, Ylinen EE, Punkkinen M
Publisher: ELSEVIER SCIENCE BV
Publication year: 1998
Journal:: Solid State Nuclear Magnetic Resonance
Journal name in source: SOLID STATE NUCLEAR MAGNETIC RESONANCE
Journal acronym: SOLID STATE NUCL MAG
Volume: 10
Issue: 3
First page : 129
Last page: 135
Number of pages: 7
ISSN: 0926-2040
DOI: https://doi.org/10.1016/S0926-2040(97)00082-9
Abstract
Optimal conditions were calculated for the excitation and detection of the five quantum coherence of quadrupolar nuclei with 1 = 5/2 in powder samples, observed by the two-pulse sequence (theta(1))(x) - tau(1) - (theta(2))(alpha) -tau(2), where alpha is the phase cycling angle. We varied the pulse lengths and the relative values of the nutation frequency omega(1) = gamma B-1 and the quadrupolar frequency omega(Q). Also, the effect of the resonance offset was studied under optimal conditions. Besides, the conditions for obtaining the maximal echo amplitude after the two-pulse sequence with alpha=y were found. Theoretical results were compared with experiments on Al-27 nuclei in polycrystalline AlCl3. (C) 1998 Elsevier Science B.V.
Optimal conditions were calculated for the excitation and detection of the five quantum coherence of quadrupolar nuclei with 1 = 5/2 in powder samples, observed by the two-pulse sequence (theta(1))(x) - tau(1) - (theta(2))(alpha) -tau(2), where alpha is the phase cycling angle. We varied the pulse lengths and the relative values of the nutation frequency omega(1) = gamma B-1 and the quadrupolar frequency omega(Q). Also, the effect of the resonance offset was studied under optimal conditions. Besides, the conditions for obtaining the maximal echo amplitude after the two-pulse sequence with alpha=y were found. Theoretical results were compared with experiments on Al-27 nuclei in polycrystalline AlCl3. (C) 1998 Elsevier Science B.V.
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