ANALYZING POWERS FOR THE H-2((P)OVER-RIGHT-ARROW,PN)H-1 REACTION AT 200 MEV

We measured the analyzing power A, and the triple differential cross s ection d(3) sigma/d Omega(p)d Omega(n)dE(p) for the H-2((p) over right arrow,pn)H-1 reaction at 200 MeV. Coplanar coincidence data were take n for all combinations of neutron angles theta(n)=35 degrees, 45 degre es, or 55 degrees with proton angles theta(p)=35 degrees, 45 degrees, or 52 degrees. Protons were detected with a Delta E-E telescope with a 1000-mu m silicon surface barrier Delta E detector and a plastic scin tillator E detector. Neutrons were detected with large-volume plastic scintillators at flight paths of 17.5 or 18 m. The overall neutron sep aration-energy resolution was about 3 MeV. Data are compared with plan e-wave impulse-approximation calculations with a Hulthen deuteron wave function and p-n cross sections and analyzing powers obtained from N- N phase shifts. The agreement between these calculations and the data is generally good for the cross sections. The agreement for the analyz ing powers is good near the point of zero recoil momentum. Our results suggest that the deuteron is a good ''neutron target'' for recoil mom enta <100 MeV/c.