Abstract
We calculate all spin-transfer observables for the quasielastic (p→,n→) reaction in a relativistic plane-wave impulse approximation. The nuclear structure information is contained in a large set of nuclear response functions that are computed in nuclear matter using a relativistic random-phase approximation to the Walecka model. A reduced value of the nucleon mass in the medium induces important dynamical changes in the residual isovector interaction relative to its nonrelativistic counterpart. As a result, good agreement is found for all spin observables—including the spin-longitudinal to spin-transverse ratio—when compared to the original (q=1.72 ) NTOF (neutron time-of-flight facility) experiment. In contrast, the spin-longitudinal to spin-transverse ratio is underpredicted at q=1.2 and overpredicted at q=2.5 . We comment on the role of distortions as a possible solution to this discrepancy.
- Received 1 July 1994
DOI:https://doi.org/10.1103/PhysRevC.50.2540
©1994 American Physical Society