Abstract
The dipole resonances in the light nucleus were studied measuring the energy spectra and angular distributions of charged pions in the spin-flip charge-exchange reaction (e,Be at =200 MeV. The ground state and eight excited states below =18 MeV in were observed. The angular distributions were analyzed within the framework of the distorted-wave impulse approximation. A considerable amount of the deduced E1 strengths is distributed over excitation energies much lower than 18 MeV in . The energy distributions of the E1 strengths of transitions to the s- and d-shell states were compared with the results of theoretical calculations with the effect of loosely bound neutron states.
- Received 26 July 1994
DOI:https://doi.org/10.1103/PhysRevC.51.493
©1995 American Physical Society