Quantum beats from nuclei excited by synchrotron pulses

Synchrotron pulses will excite low-lying nuclear levels whose subsequent decay will exhibit beats with frequencies equal to the nuclear hyperfine splittings. The highly collimated pulses incident on very small enriched single crystals at a Bragg angle will result in an appreciable fraction of the incident radiation in the spectral width of the nuclear resonance being coherently scattered into a highly collimated beam which will exhibit beats corresponding to the difference frequencies emitted by different nuclei, and a decay parameter $\Gamma$, with marked time dependence.