Explore BrainMass

The problem highlights some key advanced NMR definitions, that are presentated towards the end of the undergraduate NMR course. The solution provides concise informative definitions that are frequently required by examiners.


Please describe the following terms:

1) Larmor Frequency
2) Nuclear Overhauser Effect
3) 180° Pulse
4) Spin Lattice relaxation
5) Free Induction Decay

Solution Preview

Please see attached word file for symbols to accompany this answer. (Brainmass Solution 10)


1) Larmor Frequency

Nuclei that have the characteristic of spin have a nuclear magnetic moment  as a result of their spin. The magnetic moment  interacts with an applied magnetic field denoted Bo. The magnetic moment  precesses about Bo with a frequency known as the Larmor frequency

2) Nuclear Overhauser Effect (NOE)

Allows determination of which nuclei are close together in space. It is a change in ...