Spin-flip cross sections for 13C(p

Abstract

It was recently shown that analyzing power data for 500 MeV(/ital p/,/ital n/) charge exchange from /sup 15/N could not beadequately explained by either relativistic or nonrelativistic distorted waveimpulse approximation models. In general, reaction models which incorporaterelativistic dynamics provide a successful description of proton-nucleuselastic scattering at intermediate energies. It is therefore important tounderstand the reasons for the apparent failure of the theoretical models withrespect to the description of (/ital p/,/ital n/) charge exchange data from oddtargets. In this work a method of analyzing intermediate energy(/ital p/,/ital n/) reaction data from odd target nuclei is presented whichfocuses attention on specific dynamical elements of the relativistic distortedwave impulse approximation model. Included in these elements are the differentpieces of the Lorentz invariant nucleon-nucleon isovector effective interactionand the aspects of nuclear structure associated with the valence nucleon. Theanalysis utilizes certain linear combinations of the (/ital p/rvec //,/ital n/rvec //)polarization transfer observables, the important quantities being thetransverse and longitudinal spin-flip cross sections and the projectileno-spin-flip cross section. The method is illustrated with relativisticdistorted wave impulse approximation calculations for the/sup 13/C(/ital p/rvec //,/ital n/rvec //)/sup 13/N(g.s.) reaction at 500MeV. It is intended that analyses of this type will provide an important toolfor diagnosing the apparent inadequaciesmore » with the theoretical description ofintermediate energy (/ital p/,/ital n/) charge exchange from odd nuclei.« less