Abstract
Photon scattering experiments have been performed to investigate the structure of the two doubly magic nuclei The method is highly selective to induce low-order multipole transitions, i.e., and from the ground state. We determined the energies and spins of excited states and the absolute strengths of the decays in a model independent way. We find the summed electric dipole strengths below 10 MeV to exhaust the energy weighted sum rule by 0.023 and 0.27 %, respectively. The summed electric quadrupole strengths are and for and respectively. In order to explain the difference in the strengths of the two isotopes several theoretical models are discussed.
- Received 20 September 2001
DOI:https://doi.org/10.1103/PhysRevC.65.034301
©2002 American Physical Society