4 research outputs found

    Change of the dipole strength distributions between the neighbouring #gamma#-soft nuclei "1"9"4Pt and "1"9"6Pt

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    A nuclear resonance fluorescence experiment with two highly efficient EUROBALL Cluster detectors has been performed on the #gamma#-soft nucleus "1"9"4Pt. Dipole excitations were observed between 2 MeV and 4 MeV excitation energy. They are tentatively interpreted as the main fragments of the scissors mode based on the measured excitation strengths and a comparison to microscopic calculations in the framework of the quasiparticle random phase approximation (QRPA). The data indicate large differences to the neighbouring isotope "1"9"6Pt: a doubling of the observed dipole strength and a shift of the energy centroid by about 600 keV. None of the currently available models is able to reproduce these features consistently in both nuclei. (orig.)Also published in: Physics Letters B 554(2003), p. 15-20SIGLEAvailable from TIB Hannover: RN 5633(2002,28) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDeutsche Forschungsgemeinschaft (DFG), Bonn (Germany)DEGerman
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