Nuclear Resonant Scattering (NRS) is a specialized technique used to study materials by examining nuclear energy levels and interactions. The technique utilizes hyperfine interactions that split nuclear energy levels. This method is simply put Mossbauer spectroscopy with an extra time dependent component.
First the system is excited by synchrotron radiation pulses at the same time, exciting nuclear transitions. Secondly, the excited states will decay, emit quanta close in energy that lead to interference effects. These interference effects are quantum beats and will cause a time spectrum. Lastly, this is analysed by fourier transformation of the time spectrum.