Spin diffusion measurements: spin echoes in the presence of a time‐dependent field gradient
EO Stejskal, JE Tanner - The journal of chemical physics, 1965 - pubs.aip.org
A derivation is given of the effect of a time‐dependent magnetic field gradient on the spin‐
echo experiment, particularly in the presence of spin diffusion. There are several reasons for
preferring certain kinds of time‐dependent magnetic field gradients to the more usual steady
gradient. If the gradient is reduced during the rf pulses, H 1 need not be particularly large; if
the gradient is small at the time of the echo, the echo will be broad and its amplitude easy to
measure. Both of these relaxations of restrictions on the measurement of diffusion …
echo experiment, particularly in the presence of spin diffusion. There are several reasons for
preferring certain kinds of time‐dependent magnetic field gradients to the more usual steady
gradient. If the gradient is reduced during the rf pulses, H 1 need not be particularly large; if
the gradient is small at the time of the echo, the echo will be broad and its amplitude easy to
measure. Both of these relaxations of restrictions on the measurement of diffusion …