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Nuclear resonant scattering is dubbed the time-based analogue of Mössbauer spectroscopy. This is because this kind of Mössbauer spectroscopy is performed in the time domain. Actually, via a Fourier transform it is possible to go from the energy domain to the time domain. Synchrotron radiation is appropriate for this because of its time structure: the radiation comes in pulses. In a first stage, all available transitions in a sample are excited and in the second stage, we study the quanta emitted from the excited sample due to the decay of the excited states. This decay causes a beat pattern to appear: the time spectrum. The quantum beats in the time spectrum make it possible to extract, via numerical analysis, information about the hyperfine parameters.
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