Abstract
The vibrational states of , , and have been studied via Coulomb excitation. Thin high purity targets were prepared in an isotope separator. The Coulomb excitation of these nuclei was studied by the scattering of 12-16 MeV particles, which were detected in an Enge split-pole spectrograph. The reduced transition probabilities were obtained for , and states in each nucleus. Limits on values and values extracted from published () cross sections are also presented. Trends in values and energy levels for the Dy, Er, and Yb nuclei show that the levels are reasonably constant in energy for only Dy and Er. In all three nuclei values decrease with increasing neutron number. Except for the Dy isotopes, the lightest isotope has the largest value for the lowest lying state. states level energies and values are found to be in fair agreement with microscopic calculations. Values of for states are in fair agreement with microscopic calculations when these exist.
NUCLEAR REACTIONS , , , MeV; measured , deduced . Enriched targets.
- Received 25 January 1982
DOI:https://doi.org/10.1103/PhysRevC.26.97
©1982 American Physical Society