CW NMR

This exciting experiment get the spin magnetic moment of the proton. A good trick indeed. 

Nuclei possess a magnetic moment μ which is proportional to the spin, we will measure the gyromagnetic ratio for protons, see here Proton_magnetic_moment

Magnetogyric ratio can easily be determined by measurement of the resonant frequency for different magnetic field magnitudes and performing a linear regression analysis knowing that γ is slope. 

The resonant frequency corresponds to the energy needed to flip the protons spin in the applied B-field. (We have hf=μB because the difference in initial and final spin projection is 1/2-(-1/2))

Experimental setup: You will simply make a plot of f vs B as on page 58 of the manual.

Each data point is made as on, for example, page 48 of the manual for acrylic.

Do this for at least 2 samples and compare your numbers.

The manual is below and here:

CW-NMR manual