So I am trying to understand how a signal is being produced in CW NMR and I cam across this online

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An it talks about how the in CW the spectrum depends only the current being induced in the x-y plane. But what I dont understand is how the current in the CW b) is being generated if it is not precessing around the x-y axis like the pulse, method in d).

Link provied below.


  • 1
    $\begingroup$ Why do you think the nuclei are not precessing in the CW mode? They are being excited with a weak RF field, and will precess. There will only be a strong signal when the excitation is at the resonant frequency. So the amplitude of the response signal (transverse magnetization) depends on whether you are at (close to) resonance. $\endgroup$ – Floris Nov 28 '18 at 0:11

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