Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 19: Nuclear Structure/Spectroscopy III

HK 19.9: Vortrag

Dienstag, 9. März 2004, 18:00–18:15, D

Photon scattering from ⁹²Mo, ⁹⁸Mo and ¹⁰⁰Mo up to the neutron-separation energy — •G. Rusev¹, R. Schwengner¹, A. Wagner¹, K.D. Schilling¹, M. Erhard¹, F. Dönau¹, A.R. Junghans¹, K. Kosev¹, and E. Grosse^1,2 — ¹Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, Dresden, Germany — ²Technische Universität Dresden, Dresden, Germany

We present the results of photon-scattering experiments on the nuclei ⁹²Mo, ⁹⁸Mo and ¹⁰⁰Mo up to the neutron-separation energy. The experiments were carried out at the new bremsstrahlung facility of the Rossendorf ELBE accelerator at electron energies of 9 and 12.6 MeV. Samples of about 3 g of highly enriched ⁹²Mo, ⁹⁸Mo and ¹⁰⁰Mo, respectively, were used in the nuclear-resonance-fluorescence experiments. Scattered photons were measured with four escape-suppressed HPGe detectors placed two by two at 90^∘ and 127^∘, respectively, relative to the incident photon beam.
The dependence of the observed dipole-strength distributions on the neutron number of the Mo isotopes is discussed. The experimental results are compared with predictions of RPA calculations.
^⋆ Supported by the DFG under contracts Do 466/1-1 and Do 466/1-2.