Nucleon knockout from polarized 3He by polarized protons at 290 MeV
Abstract
The 3-->(p-->,2p) and 3-->(p-->,pn) knockout reactions were observed in quasielastic kinematics at 290 MeV. Spin observables An0, A0n, and Ann were obtained for both reactions. Calculations using the plane wave impulse approximation (PWIA) and the free nucleon-nucleon scattering amplitudes were performed and compared with the data. The proton knockout data are in qualitative agreement with the calculations which predict Ann to be sensitive to the presence of mixed-symmetry S' components in the 3He wave function. Proton spins are expected to be exactly paired at momenta q~=80 MeV/c, in agreement with the Ann data. Spin observables A0n and Ann for the 3-->(p-->,pn) reaction deviate significantly from the PWIA predictions. The qualitative differences between proton and neutron knockout results may be caused by final-state interaction effects.
- Publication:
-
Physical Review C
- Pub Date:
- October 1992
- DOI:
- 10.1103/PhysRevC.46.1167
- Bibcode:
- 1992PhRvC..46.1167R
- Keywords:
-
- 25.10.+s;
- 24.70.+s;
- 25.40.-h;
- Nuclear reactions involving few-nucleon systems;
- Polarization phenomena in reactions;
- Nucleon-induced reactions