The 13C nucleus is a spin particle, which means it can orient in two directions
ID: 788603 • Letter: T
Question
The 13C nucleus is a spin particle, which means it can orient in two directions in a magnetic field (with the field and against it). The difference in energy between the two orientations is given by:
Change in E = (0.7058*10^-26 J/T) B
where B is the magnetic field strenbth in Tesla. In an NMR spectrometer with a 1.45 T field strength, what is the ratio of the population of nuclei oriented opposite the magnetic field with respect to those oriented with the magnetic field at 25 degrees Celcius?
Explanation / Answer
Boltzmann Distribution N?/N? = exp(-?E/kT) where N? and N? are the numbers of nuclei in the ground and excited states respectively; ?E is the energy difference between them, k is the Boltzmann const and T the absolute temp. ?E= (0.705
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