Low-lying octupole strength in 112Cd

The low-lying octupole strength distribution in 112Cd has been measured by means of inelastic proton scattering. A splitting of the strength has been observed and interpreted as due to the interaction between the quadrupole and octupole degrees of freedom. The splitting can be reproduced by the IBA-1 model if the coupling of f- and d-bosons is considered

Quadrupole core polarization charges in the A=100 and 150 mass regions

The neutron and proton quadrupole core polarization charges are evaluated from the comparison of 0gs+ → 21+ quadrupole transition matrix elements measured by inelastic scattering of different incident probes on Mo, Pd, Cd, Nd, Sm, Gd and Dy isotopes. The resulting values, and in particular those obtained in the framework of the interacting boson model, are discussed with special attention to the evaluation of the strength of low-lying mixed-symmetry states

Quadrupole boson structure form factors for proton scattering from the IBA model and electron scattering

Inelastic proton scattering from 110Pd has been measured at Ep = 30.7 MeV. Angular distributions for three low-lying 2+ states are satisfactorily reproduced by employing reduced matrix elements from the IBA model and form factors evaluated from two quadrupole transition charge densities (determined from electron scattering) folded with a nucleon—nucleon interaction. The relative phase between these two transition charge densities could be determined because of coupled channel effects in inelastic proton scattering. This leads to boson structure form factors for proton scattering resembling a Woods-Saxon first derivative for the d-boson non-conserving part and a Woods-Saxon second derivative with a reduced radius for the d-boson conserving part

TRANSITION CHARGE-DENSITIES OF LOW-LYING COLLECTIVE STATES IN PT 196 FROM INELASTIC ELECTRON-SCATTERING

Differential cross sections for levels in the excitation-energy range from 0 to 3.0 MeV in Pt-196 have been measured by inelastic electron scattering in a momentum-transfer range up to 2.5 fm-1. The ground-state charge density and the transition charge densities of nine low-lying collective levels have been extracted in a Fourier-Bessel analysis of these data. The densities are compared with those obtained from microscopic calculations within the quasiparticle phonon model, using the single-particle basis obtained from a density functional approach. Satisfactory agreement has been obtained, in spite of the complicated structure of Pt-196

Neutron transition moments and quadrupole T- or F-vector states

A study of low-lying 2+ states by proton and deuteron inelastic scattering from 104Pd, 110Pd, 112Cd, 146Nd, 150Nd and 150Sm is described. Evidence of neutron components in the excitation of 2+ states lying between 2.2 and 3.0 MeV in Pd and Cd isotopes has been obtained. This result is consistent with the predictions of the IBM-2 model for mixed-symmetry states