Abstract
The cross sections for single-nucleon knockout from Ca on a Be target at 70 MeV/nucleon were measured to be mb for proton knockout and mb for neutron knockout. The spectroscopic factors and orbital angular momenta of the neutrons and protons removed from Ca, leading to bound residues, were deduced by comparison of the experimental cross sections and longitudinal-momentum distributions to those calculated in an eikonal reaction theory, and found to be and (relative to independent-particle-model values and only including experimental contributions to the uncertainties). As found in previous knockout studies, the spectroscopic factor deduced for the deeply bound neutron was significantly reduced relative to shell-model calculations, a result at variance with dispersive optical model (DOM) extrapolations, which suggest a spectroscopic factor closer to of the independent-particle-model value.
- Received 29 March 2012
DOI:https://doi.org/10.1103/PhysRevC.85.064612
©2012 American Physical Society