Consider the pathway shown below for a heteronuclear experiment.

Write down the spatially dependent phase which accrues during the two gradient pulses, and hence determine the ratio (G1T1)/(G2T2) which will refocus the pathway.
Assuming that U is 1H and S is 15N, and that the gradients have the same duration, work out the ratio of gradient strengths needed to select this pathway, given that γ (1H) ‰ˆ -10
γ(l5N).

Transcribed Image Text:

S G +1 0-110-1