Abstract
Double-differential cross sections and analyzing powers for the reactions on and were measured at 200 MeV between and The neutron spectra from are dominated by the quasifree scattering peak and show no evidence for resonances in the three-proton system. The spectra from exhibit strong resonance behavior in the system at low relative energies owing to the excitation of known resonances in but there is no distinct quasifree peak in the measured spectra. The experimental for averaged over the experimental range of neutron energies, are similar to those for free nucleon-nucleon scattering, whereas for the are generally larger than the free values. The cross sections at far forward angles for both and appear to be suppressed relative to the free NN cross sections by Pauli blocking. At most angles, the shapes of the cross section spectra from both and are reproduced by distorted-wave impulse approximation (DWIA) calculations using a quasifree scattering model. Specifically for the model requires the use of an optical potential which has a strong potential resonance corresponding to the low-lying states in
- Received 31 December 1997
DOI:https://doi.org/10.1103/PhysRevC.58.645
©1998 American Physical Society