Quasielastic 12C(e,e'p) Reaction at High Momentum Transfer

Details Quasielastic 12C(e,e'p) Reaction at High Momentum Transfer Quasielastic 12C(e,e'p) Reaction at High Momentum Transfer

1998-11-30

arxiv.org/abs/nucl-ex/9811012v1

Phys.Rev.C59:221-232,1999

Physics

Nuclear Physics

Nuclear Experiment

14 pages, 7 figures, Revtex (multicol, prc and aps styles), to appear in Phys Rev C

Scientific paper

10.1103/PhysRevC.59.221

We measured the 12C(e,e'p) cross section as a function of missing energy in parallel kinematics for (q,w) = (970 MeV/c, 330 MeV) and (990 MeV/c, 475 MeV). At w=475 MeV, at the maximum of the quasielastic peak, there is a large continuum (E_m > 50 MeV) cross section extending out to the deepest missing energy measured, amounting to almost 50% of the measured cross section. The ratio of data to DWIA calculation is 0.4 for both the p- and s-shells. At w=330 MeV, well below the maximum of the quasielastic peak, the continuum cross section is much smaller and the ratio of data to DWIA calculation is 0.85 for the p-shell and 1.0 for the s-shell. We infer that one or more mechanisms that increase with $\omega$ transform some of the single-nucleon-knockout into multinucleon knockout, decreasing the valence knockout cross section and increasing the continuum cross section.

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