Spin-correlation parameter /ital A//sub /ital nn//(theta) for /ital n/-/ital p/ elastic scattering at 790 MeV

The spin-correlation parameter /ital A//sub /ital nn// for free /ital n/-/ital p/elastic scattering has been measured for the first time forincident-neutron-beam energy /ital E//sub /ital n//=790 MeV and c.m. angles48/degree/less than or equal totheta/sup */less than or equal to149/degree/. The data are compared with thewidely differing predictions of several phase-shift analyses, clearly favoringone of them. They also are compared with recently published quasifree/ital A//sub /ital nn// data for the more limited c.m. angular region98/degree//approx lt/theta/sup *//approx lt/122/degree/.