Study of medium effect in NN interaction by using (p,pn) reactions
Abstract
Exclusive measurement of nucleon quasifree scattering is a direct tool to investigate how nucleon-nucleon (NN) interaction changes in the nuclear medium. We measured analyzing powers (Ay) for 1s1/2-knockout (p,pn) reactions on light nuclei aiming at studying such modification. The experiment was performed at RCNP with a 392 MeV proton beam. It is found that the ^12C(p,pn) exclusive Ay data are mostly consistent with impulse calculations based on the p-n interaction in free space, in contrast to the (p,2p) case, where a strong suppression of Ay is observed. This large imbalance between the (p,pn) and (p,2p) results is difficult to explain in conventional models.
- Publication:
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APS Meeting Abstracts
- Pub Date:
- October 2009
- Bibcode:
- 2009APS..HAW.KC005Y