Köln 2004 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 43: Nuclear Structure/Spectroscopy VII
HK 43.1: Gruppenbericht
Donnerstag, 11. März 2004, 16:30–17:00, A
Photon scattering from heavy nuclei up to energies well above particle emission thresholds — •A. Wagner1, F. Dönau1, M. Erhard1, E. Grosse1,2, A.R. Junghans1, K. Kosev1, G. Rusev1, K.D. Schilling1, and R. Schwengner1 — 1Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, Dresden, Germany — 2Technische Universität Dresden, Dresden, Germany
Bremsstrahlung facilities at low-energy electron accelerators have delivered a large number of very interesting results on nuclear resonance fluorescence (NRF) via bound states. Comparatively few results have been reported on photon scattering from heavy nuclei at energies above particle emission thresholds. At the new superconducting electron accelerator ELBE at Dresden - Rossendorf various efforts on the identification and reduction of background in NRF photon spectra were successful such that reasonably clean spectra could be accumulated even at endpoint energies above the giant dipole resonance (GDR). The dipole strength distribution below and in the GDR of 208Pb and in the threshold region of the Mo-isotopes can be extracted from the data; the good energy resolution in the Ge-detectors (∼ 7 keV) allows to also study its fine structure. Such hitherto unknown experimental information is to be compared to RPA-calculations as well as to the continuum shell model.