Abstract
A photon scattering experiment has been performed on the odd-A nucleus . Strong dipole excitations have been detected in the energy region around 3.2 MeV. This is near the expected position of the two-phonon (⊗) multiplet in the even-even neighboring nucleus . The summed dipole strength between 2.8 and 3.6 MeV in is in agreement with the sum rule for weak particle coupling to the core nucleus . Model calculations in a harmonic approximation are in a very good agreement with the experiment and they suggest a two-phonon (⊗) particle structure of the excitations in .
- Received 10 February 1993
DOI:https://doi.org/10.1103/PhysRevLett.70.2880
©1993 American Physical Society