Abstract
The stripping reaction (α,He) at 183 MeV incident energy has been used to study the neutron-particle response function on a target nucleus up to 15 MeV excitation energy. Detailed spectroscopic information has been obtained on the low-lying neutron states (0–4 MeV) through angular distribution measurements and standard distorted wave Born approximation analysis. A large enhancement of cross section is observed between 5 and 15 MeV. It appears as a broad bump superimposed on a continuous background which has been analyzed within the framework of the plane wave breakup model. The excitation energies, angular distributions, and strengths of these high-lying transitions suggest that they arise from neutron stripping to high-spin outer subshells, i.e., 2, 1, and 1 in . The results are compared with predictions from the core-particle model and from the quasiparticle-phonon model.
- Received 28 April 1986
DOI:https://doi.org/10.1103/PhysRevC.34.1256
©1986 American Physical Society