Abstract
A treatment of the magnetic resonance is given for a particle with spin ½ in a constant field and under the action of an arbitrary alternating field with circular frequency perpendicular to . A method of finding a solution, valid at any time, is given which converges the better the smaller the deviations from a rotating field or the larger . It is shown that in the lowest order correction the shape of the resonance curve is unchanged but that it is shifted by a percentage amount where is the effective amplitude of the oscillating field. This also involves a correction in the values of the magnetic moments thus obtained towards smaller values which however in all practical cases is negligibly small.
- Received 19 January 1940
DOI:https://doi.org/10.1103/PhysRev.57.522
©1940 American Physical Society