Abstract
High-resolution inelastic electron scattering [full width at half-maximum (FWHM) ≃ 38 keV] with 50-MeV electrons on yields a width MeV for the 8.9-MeV resonance. This result together with the results from a reanalysis of older data with moderate energy resolution (FWHM ≃ 300 keV) shows that the previous identification of the 8.9-MeV resonance as a monopole excitation is not conclusive. The excitation of this state may as well be . The giant quadrupole resonance at 10.8 MeV seen in former measurements has been reanalyzed.
- Received 4 August 1975
DOI:https://doi.org/10.1103/PhysRevLett.35.1244
©1975 American Physical Society