Abstract
Differential cross sections and complete sets of polarization observables are presented for the Gamow-Teller reaction at a bombarding energy of 296 MeV with momentum transfers of 0.1 to . The polarization transfer observables are used to deduce the spin-longitudinal cross section, , and spin-transverse cross sections, and . The data are compared with calculations based on the distorted-wave impulse approximation (DWIA) using shell-model wave functions. Significant differences between the experimental and theoretical results are observed for all three spin-dependent at momentum transfers of , suggesting the existence of nuclear correlations beyond the shell model. We also performed DWIA calculations employing random-phase approximation (RPA) response functions and found that the observed discrepancy is partly resolved by the pionic and ρ-mesonic correlation effects.
7 More- Received 24 March 2009
DOI:https://doi.org/10.1103/PhysRevC.80.024319
©2009 American Physical Society