Role of the spin relaxation effects into both magnetic nanoclusters and low-spin paramagnetic complexes in nuclear forward scattering of synchrotron radiation

摘要

The effects of electron fluctuations on nuclear forward scattering of synchrotron radiation (SR) are theoretically modeled when a nuclear target is a low-spin protein complex. Two possible cases of the states of Mossbauer ion are considered: 1) the subsystems of electron and nuclear states which are independent from each other in the effective magnetic field model: 2) the coupled electron-nuclear system of states under an external orient magnetic field. The influence of spin fluctuations on the patter of quantum beats of resonant response to SR pulse is analyzed in both general relaxation model and stochastic 'strong redistristribution' model of spectral diffusion.