CHEM 3P40 Chapter Notes -Gyromagnetic Ratio, Boltzmann Distribution, Gyroscope
11 Sep 2013
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Document Summary
Some atomic nuclei have a nuclear spin (i), and the presence of a spin makes these nuclei behave rather like bar magnets. In the presence of an applied magnetic field, the nuclear magnets can orient themselves in 2i+1 ways. In the application of nmr spectroscopy, 1h and 13c are the most important, and both have spins of. These nuclei, therefore, can take up only one of two orientations; A low energy orientation aligned with the applied field. A high energy orientation opposed to the applied field. Is the magnetogyric ratio (a proportionality constant, differing for each nucleus, which essentially measures the strength of the applied magnetic field) The number of nuclei in the low energy state (n ) and the number of nuclei in the high energy state (n ) will differ by an amount determined by the boltzmann distribution:
