Hahn-echoes from 14N in solids by the stray-field method: prospects for imaging using Long Echo-Train Summation.
We have observed Hahn-echoes resulting from Powles-Mansfield pulse-sequences for a variety of nitrogen containing solids which exhibit a range of 14N electric quadrupole coupling constants (Cq) from 0 to 4.9 MHz. Long echo-decays were frequently obtained which allowed the collection of many echoes in one echo-train, so that the method of Long Echo-Train Summation (LETS), could be used to accumulate signal. A one-dimensional STRAFI-profile is shown for solid ammonium nitrate. The spatial resolution is discussed as a function of Cq.
Randall
E W
EW
Department of Chemistry, Queen Mary and Westfield College, London, UK.
Samoilenko
A A
AA
Fu
R
R
D000643:Ammonium Chloride / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D009584:Nitrogen / Q000032:analysis*
D000643:Ammonium Chloride; D009584:Nitrogen