Abstract
Predictions are made for the structure of a second 2 resonance, the soft dipole mode and unnatural parity modes in the He continuum. We use a structure model which describes the system as a three-body ++ cluster structure, giving the experimentally known properties of He and Li, and use the distorted-wave impulse approximation (DWIA) reaction theory appropriate for dilute matter. The presence of both resonant and nonresonant structures in the halo excitation continuum is shown to be manifest in charge-exchange reactions as well as inelastic scattering with single nucleons.
- Received 4 September 1996
DOI:https://doi.org/10.1103/PhysRevC.55.R577
©1997 American Physical Society