THE OVERHAUSER EFFECT IN PARAMAGNETIC SYSTEMS

摘要

A negative nuclear polarization in which the higher nuclear Zeeman levels are more populated than the lower energy levels could be used as a low-noise quantum mechanical amplifier of radiofrequency signals. In the second half of the report, in Sections 6-11 inclusive, is considered various systems which have or might be investigated experimentally by simultaneous saturation of the electron or hole spin resonance and observation of an appropriate nuclear magnetic resonance frequency.nThere are several important double resonance techniques which have not been considered in this report. These are dynamic polarization, ENDOR, and optical pumping. These are all sufficiently closely related to the Over hauser effect that a discussion of their relative merits would be most instructive.