Gamma-radiation in non-Markovian Fermi systems

The gamma-quanta emission is considered within the framework of the non--Markovian kinetic theory. It is shown that the memory effects have a strong influence on the spectral distribution of gamma-quanta in the case of long-time relaxation regime. It is shown that the gamma-radiation can be used as a probe for both the time-reversible hindrance force and the dissipative friction caused by the memory integral.