Theoretical investigations of I=5/2 quadrupolar spin dynamics in the sudden-passage regime

TitleTheoretical investigations of I=5/2 quadrupolar spin dynamics in the sudden-passage regime
Publication TypeJournal Article
Year of Publication2002
AuthorsWalls J.D, Lim K.H, Logan J.W, Urban J.T, Jerschow A., Pines A
JournalJournal of Chemical Physics
Volume117
Issue2
Pagination518-532
Date PublishedJul 8
ISBN Number0021-9606
Accession NumberWOS:000176424800003
KeywordsSPECTROSCOPY
Abstract

The theoretical approach utilizing bimodal Floquet theory in the quadrupolar/central-transition interaction frame, presented in an earlier article [J. D. Walls, K. H. Lim, and A. Pines, J. Chem. Phys. 116, 79 (2002)], is extended to describe the more complicated spin dynamics of I=5/2 spin systems. Rotary resonance effects occur when the strength of the radio-frequency irradiation, omega(1), matches the sample spinning speed, omega(r), at the conditions omega(1) = 2/3nomega(r) (n integral). At these conditions, conversions of both triple-quantum and five-quantum coherences to central-quantum coherence are observed. Between rotary resonance conditions [ 2n/3omega(r)<ω(1)<[2(n+1)]/3ω(r)], five-quantum as well as triple-quantum coherences can be created from equilibrium z-magnetization via a nutation mechanism. In addition, effective transfer between five-quantum and triple-quantum coherences also is observed in between rotary resonance conditions. These effects have been investigated theoretically and verified by both numerical calculations and experimental results. (C) 2002 American Institute of Physics.

URL<Go to ISI>://WOS:000176424800003
DOI10.1063/1.1483256
Short TitleTheoretical investigations of I=5/2 quadrupolar spin dynamics in the sudden-passage regime
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