Contribution of the Electronic Spin-Spin Interactions in the Dynamic Nuclear Polarization. I. Theory

Abstract

A theory of the dynamic nuclear polarization is developed by taking into account the electronic spin-spin interactions. It is shown that both the solid effect and the cross effect contribute to the nuclear polarization in the case of a broad inhomogeneous line of ESR. The solid effect will be dominant at high temperature and the cross effect becomes important at low temperature. The results of numerical calculations are given in various cases considered.