title: Hahn-echoes from 14N in solids by the stray-field method: prospects for imaging using Long Echo-Train Summation.
abstract: 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.
authors.affiliation: Department of Chemistry, Queen Mary and Westfield College, London, UK.
authors.forename: E W
authors.initials: EW
authors.lastname: Randall
authors.forename: A A
authors.initials: AA
authors.lastname: Samoilenko
authors.forename: R
authors.initials: R
authors.lastname: Fu
mesh_terms: D000643:Ammonium Chloride / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D009584:Nitrogen / Q000032:analysis*
chemical_list: D000643:Ammonium Chloride; D009584:Nitrogen