Abstract
We analyze data for with using the relativistic distorted-wave impulse approximation (RDWIA) based upon Dirac-Hartree wave functions. The normalization extracted from data for (GeV/c) is approximately 0.87, independent of , which is consistent with the predicted depletion of the orbital by short-range correlations. The total and strength for approaches 100% of IPSM (independent particle shell model), consistent with a continuum contribution for of about 12% of IPSM. Similarly, a scale factor of 1.12 brings RDWIA calculations into good agreement with data for transparency. We also analyzed low data from which a recent nonrelativistic RDWIA analysis suggested that spectroscopic factors might depend strongly upon the resolution of the probe. We find that the momentum distributions for their empirical Woods-Saxon wave functions fit to low data for parallel kinematics are too narrow to reproduce data for quasiperpendicular kinematics, especially for larger , and are partly responsible for reducing fitted normalization factors. Although the RDWIA normalization factors for are also smaller than obtained for , the effect is smaller, and we argue that it should be attributed to the effective single-nucleon current operator instead of to spectroscopic factors, which are probe-independent properties of nuclear structure. However, remediation of the failure of RDWIA calculations to reproduce low data for parallel kinematics will require a more sophisticated modification of the current method than a simple multiplicative factor.
7 More- Received 1 February 2005
DOI:https://doi.org/10.1103/PhysRevC.71.064610
©2005 American Physical Society