Physics Letters A, 68 (3-4) 339-341 (1978)

Time delay in the resonance scattering of synchrotron radiation by nuclei 
in a crystal

Yu. Kagan, A.M. Afanas'ev and V.G. Kohn

The time dependence of delayed radiation has been found when the pulse of 
synchrotron radiation undergoes the resonance Bragg scattering by nucleai 
in a crystal that have an isomeric Mossbauer level. A strong acceleration 
of the decay discovered is connected with a collective character of the 
nuclear excitation. A possibility to conserve the angle direction as well 
as the intensity and the resonance structure in the delayed reflected 
radiation is analysed.