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## Homework Statement

How many oscillations occur before Mxy decays to approximately 1/3 of its initial value, for a Larmor frequency of 100 MHz and T2 of 100ms?

## Homework Equations

I was learning about how NMR works and about transverse relaxation.

According to what I learned, we can express transverse relaxation with cosine, sine, complex number and exponential decay function (Fd(t)=exp(-t/T2)).

Thus, Mxy(t)= lMxy(t)l Fd(t)exp(-i(wt)).

## The Attempt at a Solution

I'm not sure where to put Larmor frequency in the formula. Are we trying to determine Fd(t) or Mxy?

If I assume that we are determining Fd(t) which is the exponential decay function, then I would do the following:

Set Fd(t)=100 MHz and t=100ms. Then, calculate for T2. From what I heard in the lecture, the answer should be 10^7 which I'm not getting.

Any help would be appreciated!