Variable rotation composite pulses for high resolution nuclear magnetic resonance using inhomogeneous magnetic and radiofrequency fields

TitleVariable rotation composite pulses for high resolution nuclear magnetic resonance using inhomogeneous magnetic and radiofrequency fields
Publication TypeJournal Article
Year of Publication2002
AuthorsSakellariou D., Meriles C.A, Moule A., Pines A
JournalChemical Physics Letters
Volume363
Issue1-2
Pagination25-33
Date PublishedSep 2
ISBN Number0009-2614
Accession NumberWOS:000177896600005
Keywordsechoes
Abstract

An approach toward high-resolution NMR spectroscopy on samples located outside the physical confines of a magnet (ex situ NMR), has recently been described [C.A. Meriles, D. Sakellariou, H. Heise, A.J. Moule, A. Pines, Science 293 (2001) 82]. Nutation echoes are generated by a train of z-rotation pulses in the presence of spatially matched static and rf field gradients. These pulses were based on a combination of 'perfect' pi/2 constant rotation composite pulses and 'imperfect' ordinary pulses of variable length. Here we introduce a new class of 'self-compensated' z-rotation composite pulses based only on variable rotation inversion pulses that lead to an rf dependent phase shift. Experiments and simulations show that these new pulses perform well at high B-0 gradients and require less rf power than previous schemes. (C) 2002 Elsevier Science B.V. All rights reserved.

URL<Go to ISI>://WOS:000177896600005
DOI10.1016/S0009-2614(02)01116-8
Short TitleVariable rotation composite pulses for high resolution nuclear magnetic resonance using inhomogeneous magnetic and radiofrequency fields
Download Publication: