Principles of dynamic nuclear polarisation

Abstract

After a general introduction, two sections are devoted to a survey of the theories of spin temperature and of nuclear relaxation in solids. This is followed by a short section on the so-called well-resolved solid effect, and a much more detailed one on DNP by thermal mixing in the non-linear low spin-temperature domain. One then analyses the various methods of measurement of the nuclear polarisation, as well as an indirect method of detecting the electronic resonance based on the existence of large nuclear polarisations. The final section describes briefly several applications of dynamic nuclear polarisation.