Author/Authors :
A Zilges، نويسنده , , S Volz، نويسنده , , M. Babilon، نويسنده , , T Hartmann، نويسنده , , P Mohr، نويسنده , , K Vogt، نويسنده ,
Abstract :
The semi-magic nuclei 138Ba, 140Ce, and 144Sm have been investigated in photon scattering experiments up to an excitation energy of about 10 MeV. The distribution of the electric dipole strength shows a resonance like structure at energies between 5.5 and 8 MeV exhausting up to 1% of the isovector E1 Energy Weighted Sum Rule.
