Single-nucleus quantum beats excited by synchrotron radiation
European Synchrotron Radiation Facility - BP 220, F-38043 Grenoble Cedex, France
2 Medizinische Universität zu Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany
3 Universität Hamburg, II. Phys. Exp. Phys., Luruper Chaussee 149, D-22761 Hamburg, Germany
Accepted: 21 March 1996
We have observed single-nucleus quantum beats in the incoherent scattering of synchrotron radiation by the 14.4 keV transition of . The 20 ns beat period characteristic of the nuclear excited-state splitting was clearly seen when enriched metallic samples were excited at the nuclear resonance energy or far from the resonance energy (i.e. accompanied by phonon excitation). The phase of the beat pattern is seen to change with the scattering angle in a manner consistent with the angular-momentum change of the (M1) transition.
PACS: 23.20.En – Angular distribution and correlation measurements / 76.80.+y – Moessbauer effect; other gamma-ray spectroscopy / 42.50.Md – Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency
© EDP Sciences, 1996