Physical Review A
Pulse propagation of synchrotron radiation through a nuclear two-resonance system
Uwe van Bürck, W. Potzel, P. Schindelmann, Yuri V. Shvyd'ko, Erich Gerdau, O. Leupold, H. D. Rüter
Abstract
Pulse propagation through a two-resonance medium was investigated in nuclear forward scattering (NFS) of synchrotron radiation (SR). The SR pulse was coherently transmitted through a target system exhibiting two equivalent resonances, the energy separation of which was varied via the Doppler effect. This allowed a continuous change from a single-resonance medium to a two-resonance system with adjustable splitting. For increasing splitting, the observed time evolutions of NFS changed from a dynamical beat (DB) via hybrid forms of beating into a DB-modulated quantum beat. The experimental results were consistently fitted using a dynamical theory for NFS of SR.