Quasifree polarization-transfer measurements in the (<i>p</i>→,<i>n</i>→) reaction at 495 MeV

Abstract

Results from a complete set of polarization-transfer observables for quasifree (p\ensuremath{\rightarrow},n\ensuremath{\rightarrow}) scattering at 495 MeV are reported. Measurements were carried out on ${\mathrm{CD}}_{2}$, carbon, and calcium targets at a laboratory scattering angle of 18\ifmmode^\circ\else\textdegree\fi{} using the new neutron time-of-flight facility at LAMPF. The ratio of spin-longitudinal to spin-transverse responses at a momentum transfer of approximately 1.72 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}1}$ is extracted from the data and compared to distorted-wave calculations incorporating a random-phase approximation description of the nuclear response. No enhancement is observed in the experimental ratio.