NMR Relaxometer Operating in a Continuous Mode upon Rapid Adiabatic Approach to Resonance

A nuclear magnetic resonance relaxometer operating in a continuous mode of the high-frequency low-power generation upon a rapid approach to resonance, and consequent “passage” through resonance for the time of the signal decay has been developed. In addition to the increased signal-to-noise ratio, the application of the periodic audio-frequency modulation of the magnetic field under adiabatic conditions has enabled us to obtain the absorption derivative, which, in turn, has allowed us to record the establishment of the thermodynamic equilibrium between spins and the lattice. Experimental data on the amplitude–relaxation response of the relaxometer are given. Spin–lattice relaxation times of some proton-containing substances have been determined as well.