Further improvements in the flock sequence

✍ Scribed by Katharine A. Carpenter; William F. Reynolds; Ji-Ping Yang; Raul G. Enriquez

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 673 KB
• Volume: 30
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260301309

✦ Synopsis

Abstract

The phase cycle for the FLOCK experiment was modified to provide improved suppression of artifacts and improved signal‐to‐noise ratios. An alternative version of FLOCK in which the initial BIRD pulse during t~1~ is replaced by a one‐step J filter is shown to give comparable performance, while a phase‐sensitive version of FLOCK shows the expected \documentclass{article}\pagestyle{empty}\begin{document}$ \sqrt 2 $\end{document} increase in sensitivity. Finally, while it is shown that phase‐sensitive FLOCK without decoupling during acquisition can be used to measure ^n^J(C,H) (n ≤ 2), there are serious limitations to this approach.