Superradiation in magnetic resonance

The phenomenon of superradiation due to a resonant circuit and the backward influence of the radiation field in a standard magnetic resonance experime nt is investigated. It is shown that although the effect of this phenomenon in the radio-frequency region is small, it leads to a change in the shape of the absorption line, which may be possible to observe in an appropriatel y designed experiment. The predicted shape of the wings of the absorption c urve is unusual in magnetic resonance. This analysis, using a traditional m agnetic resonance approach, compares favorably with the results of a numeri cal simulation of superradiation from a system of spins.