Nuclear moments and hyperfine interactions
Until now the nucleus has been often considered as a point charge with infinite mass, when compared to the electron mass. The hyperfine structure in high resolution optical spectra and a variety of experiments that we shall mention at a later stage, point out that the nuclear charge is actually distributed over a finite volume. Several phenomena related to such a charge distribution occur in the atom and can be described as due to nuclear moments.
KeywordsNuclear Spin Contact Term Electric Quadrupole Lamb Shift Magnetic Dipole Transition
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