Abstract
Resonant inelastic proton scattering experiments were carried out to investigate the decay of the state at an excitation energy of around 3.5 MeV in the nuclei and . -ray branching ratios were determined from -proton coincidences in both nuclei. The newly observed decay of the dipole excitation at 3225 keV in to the one-phonon states, in particular the ( → ) transition to the octupole phonon state, is the first direct proof of the two-phonon character of the 1 in any nucleus.
- Received 15 April 1996
DOI:https://doi.org/10.1103/PhysRevC.54.R449
©1996 American Physical Society