Detection of low magnetic field by means of nuclear resonance of beats

Abstract

The possibilities of detection of low magnetic fields by means of nuclear resonance of beats are discussed. It is shown that when low-frequency coherence is introduced into a system consisting of an arbitrary number of hyperfine sublevels of the atom's excited states in presence of an external magnetic field, in the high-temperature approximation and taking into account the dipole and quadrupole effects only, a complicated energy structure of hyperfine multiplets doesn't influence the dynamics of transverse components of nuclear magnetization. These occur to be just the same as in the case of two-level system. The multilevel feature of the spin system is not responsible for the fact of absence of the saturation phenomena on nuclear resonance of beats, which is characteristic of all the types of resonance of beats.