Photon scattering off 94Zr and 96Zr

Abstract

Photon-scattering experiments off the nuclei 94Zr and 96Zr were performed at the 10-MeV bremsstrahlung facility DHIPS at the super-conducting electron linear accelerator S-DALINAC at Darmstadt. The dipole excitation-strength distributions were determined in an energy range between 2 and 8 MeV, including the 1- quadrupole-octupole coupled Two-Phonon-State and parts of the Pygmy Dipole Resonance. In total 74 transitions in 96 Zr were observed and for most of the excited states the spin quantum number could be firmly assigned to J = 1. Calculations within the Quasiparticle Phonon Model show a good agreement.