In nuclear magnetic resonance (NMR), nuclei are changing spin orientation as they occupy excited states. This is obtained by exposing nuclei only to an external magnetic field.

Question

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In NMR, nuclei are exposed to an external magnetic field and also to a radiofrequency pulse. The radiofrequency pulse is crucial for changing the spin orientation of the nuclei, allowing them to absorb energy and transition between energy levels.

In Nuclear Magnetic Resonance (NMR), Nuclei Are Changing Spin Orientation