Neutron-proton elastic scattering between 200 and 500 MeV. II. Measurement ofRtandAt

Abstract
The Wolfenstein parameters Rt and At have been measured in free np elastic scattering at 220, 325, 425, and 495 MeV at 10° intervals in the center-of-mass range 60 to 160°, with errors typically ±0.05.