Question: Following the same approach as in section 7.2.2 on page 145, show that (for a single spin) a spin-echo sequence in which the 180 pulse

Following the same approach as in section 7.2.2 on page 145, show that (for a single spin) a spin-echo sequence in which the 180° pulse is about y
90o(x) - τ - 180°(y) - τ -
results in the magnetization being refocused on the -y-axis.

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