Echoes in spin systems with dipolar interactions

Autor:	P. Bilski, J. Wa̻sicki, N. A. Sergeev
Rok vydání:	2003
Předmět:	Slow motion Dipole Nuclear magnetic resonance Amplitude Chemistry Lattice (order) Echo signal Biophysics Molecular motion Physical and Theoretical Chemistry Condensed Matter Physics Spin (physics) Molecular Biology
Zdroj:	Molecular Physics. 101:335-338
ISSN:	1362-3028 0026-8976
DOI:	10.1080/0026897021000018178
Popis:	The effects of molecular motions on spin-echo signals (2n + 1)90°y—τ—90°x:—Acq(t) in nuclear spin systems with dipolar interactions have been investigated. It was found that in the case of a rigid lattice (M2τ2 c: >> 1) and a motionally narrowed NMR line (M2τ2 c,<< 1) a maximum of echo signals is observed at te = 2τ + t2—t1/2, where t1 and t2 are the widths of the RF pulses. It also was found that in the slow motion region (M2τ2 c ≊ 1) an amplitude of the dipolar echo signal is reduced and the maximum of the echo signal is shifted to the end of the second pulse. The theory developed is confirmed by the experimental results obtained for C6H6.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::76f7e6a0ee934ce5d6d3ad5fecaf241d https://doi.org/10.1080/0026897021000018178 Zobrazit plný text záznamu