MOSSBAUER TRANSITION DYNAMICS IN CONDITIONS OF STRONG EXCITATION OF NUCLEAR SPINS

The state of the art Mossbauer spectroscopy has made unquestionable ad vance possible in the solid microstructure study. Apart from that appl ication of the Mossbauer effect, another domain of investigations has been outlined since the outset, in the sixties, wherein the properties of gamma-radiation interaction with resonant nuclei in a recoilless m ode are stressed. There were these recoilless processes that enabled t o distinguish the gamma-radiation of natural width, and greatly encour aged the arising of traditional optics problems in the gamma range. Th e subject of interest in this article deals as well with the Mossbauer gamma optics. Essentially it is a gamma-ray (Mossbauer) susceptibilit y of the excited, non-equilibrium state of the nuclear spin system. We analyze the Mossbauer transitions in the strong coherent excitation o f nuclear spins regime and the possibilities to deliberately vary the polarization, spectral and/or temporal properties of gamma-radiation p ropagating through a time-modulated medium.