When I try to code the self difussion measurement pulse sequence and test
it, I found that my signals diminished at nt=4*n but not other nt numbers.
I am following the water-sLED sequence published by A.S.Altieri,
D.P.Hinton and R.A.Byrd, JACS 117, 7566-7567, 1995 because I need the
water surpression.
It seems to me like a phase cycling problem but I think I followed the
published paper as a bible.
I am using a Varian Inova500 system with a triple resonance probe and
Z-axis gradient.
If you have such a pulse sequence working on Varian machines please send
me a copy of your pulse sequence. And any suggestions are deeply
appreciated.
Leo
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Jianhua "Leo" Liu, Ph.D. NMR Facility Manager
Email: liu@main.chem.ohiou.edu Department of Chemistry
URL: http://nmr.chem.ohiou.edu Ohio University
Phone: (740)593-2738 FAX: 0148 Athens, Ohio 45701