Abstract
The broadening effects of the operators of the dipolar Hamiltonian have been determined by calculation of the correlation function of the total spectrum for a system of identical nuclei. It follows from this that operators, which are orthogonal to the Zeeman operator bring about the main broadening, whereas the other operators only slightly modify the line shape. Further-more these latter operators create a satellite line at double the resonance frequency, and also cause an asymmetry of the resonance line. Both these effects explain why these operators contribute to the moments of the total spectrum which are calculated with the zero of the frequency scale as origin, but not appreciably to the moments of the resonance line which are calculated with the resonance centre as origin.
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