A Six-Pulse PASS MAS-NMR Technique Solved by a Phasor Method

The PASS MAS-NMR technique is capable of recovering full intensities of the central resonances of a spectrum by phase adjusting the spinning sidebands. This variant of the original PASS sequence by Dixon uses six π pulses instead of four. The addition of two π pulses provides more flexibility in cho...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 1998-06, Vol.132 (2), p.266-273
Main Authors: Effey, Birgit, Butcher, J.A., Cappelletti, R.L.
Format: Article
Language:English
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Summary:The PASS MAS-NMR technique is capable of recovering full intensities of the central resonances of a spectrum by phase adjusting the spinning sidebands. This variant of the original PASS sequence by Dixon uses six π pulses instead of four. The addition of two π pulses provides more flexibility in choosing the spacing between pulses and therefore eliminates pulse overlap and receiver dead-time problems. The nonlinear, underdetermined PASS equations were solved using a graphical phasor method. All PASS sequences were successfully tested. A table of the six pulse delay times for different pitches is presented.
ISSN:1090-7807
1096-0856
DOI:10.1006/jmre.1998.1413