Rigorous Calculations and Measurements ofAy(θ)forn+dElastic-Scattering and Breakup Processes

The vector analyzing power for the $n+d\to n+n+p$ breakup reaction was measured at 12 MeV. Data for $n-p$ final-state interaction and $n-p$ quasifree scattering, along with elastic-scattering data, are compared to rigorous three-nucleon calculations using the Paris and Bonn $N-N$ potentials. Calculations agree with the quasifree data and with the elastic and $n-p$ final-state-interaction data except around ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=120\mathrm{}°$.