Title: Frequency-switched pulse sequences: Homonuclear decoupling and dilute spin NMR in solids
Abstract: A new rf pulse sequence is described for the decoupling of homonuclear dipolar interactions in solid state NMR. It involves alternate 2π rotations of opposite signs about the magic-angle axis in spin space, by π rf phase shifts synchronous with rapid switching of the rf carrier frequency between opposite sides of resonance; the frequency offsets and the rf field intensity satisfy the Lee-Goldburg coherent averaging condition. Direct digital frequency synthesis ensures phase coherence. The pulse sequence has significant advantages over previous methods in the case that abundant spins are irradiated while dilute spins are observed, in an experiment measuring heteronuclear spin-spin couplings.
Publication Year: 1989
Publication Date: 1989-03-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 465
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot