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Effects of finite pulse width on free induction decay

โœ Scribed by N.A. Sergeev

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
428 KB
Volume
8
Category
Article
ISSN
0926-2040

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โœฆ Synopsis

The shape of the free induction decay for the case in which the amplitude B, (B, = 0,/y) of the RF pulse is comparable with local magnetic fields at sites of the nuclei is considered. It is shown that the shape of the FID G(r + T) (where T is the width of a RF pulse, t is the time after a RF pulse) depends on the shape of the FID G,(t) following a hard, delta function RF pulse and on the shape of the function Fe(r), which describes the evolution of the longitudinal nuclear magnetization M, under the effect of the hamiltonian (Ho -o,l,), where H, is the interaction hamiltonian of the nuclear spin system.

Calculations of Fe (7) and G(t + T) for different interaction hamiltonians H, are presented.

๐Ÿ“œ SIMILAR VOLUMES

Effects of the finite pulse widths on so
Effects of the finite pulse widths on solid echo signals
โœ N.A. Sergeev ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 479 KB

The quadrupolar and dipolar interactions of spins during the radio frequency (RF) pulses are considered. It is shown that due to these interactions the two-pulse echo signal is observed at the shifted time t, = T + t,/2 (t, = width of the first RF pulse, 7 = time interval between the pulses).