Dynamic polarization of a nuclear zeeman subsystem within the framework of the EPR spin-temperature concept

In a high-temperature approximation, theoretical consideration is given to dynamic polarization of nuclei within the framework of the EPR spin-temperature concept. We show that the maximum polarization of nuclei can be attained at a certain value of the detuning of an SHF-field if the intensity of the latter is fixed. The possibility of determining some relaxation parameters of the system by the value of this detuning at a high value of the saturating field is shown. In the presence of a trial field, the effect of a nuclear Zeeman subsystem on the time of transverse relaxation T₂ is evaluated. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 67, No. 3, pp. 404–406, May–June, 2000.