|
|||||
|
|
Hahn-echoes from N in solids by the stray-field method: prospects for imaging using Long Echo-Train Summation |
|
| Authors: | Edward W. Randall Andrei A. Samoilenko Riqiang Fu |
| Affiliation: | a Department of Chemistry, Queen Mary and Westfield College, London E1 4NS, UK b Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow, Russian Federation c The National High Magnetic Field Laboratory, Florida State University, 1899 East Paul Dirac Drive, Tallahassee, FL 32310, USA |
| 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. |
| Keywords: | Hahn-echoes 14N Solids Stray-field Imaging LETS |
| 本文献已被 ScienceDirect 等数据库收录！ | |