Quasielastic thinsp{sup 12}C(e,e{sup {prime}}p) reaction at high momentum transfer

Journal Article · Fri Jan 01 04:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.59.221· OSTI ID:289078

Morrison, J H; Baghaei, H; Bertozzi, W; Gilad, S; Glickman, J; Hyde-Wright, C E; Kalantar-Nayestanaki, N; Lourie, R W; Penn, S; Ulmer, P E; Weinstein, L B ^[1]; Cottman, B H; Ghedira, L; Winhold, E J ^[2]; Calarco, J R; Wise, J ^[3]; Boberg, P; Chang, C C; Zhang, D ^[4]; Aniol, K ; Epstein, M B; Margaziotis, D J ^[5]; Finn, J M; Perdrisat, C; Punjabi, V ^[6]

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1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181 (United States)
3. Department of Physics, University of New Hampshire, Durham, New Hampshire 03824 (United States)
4. Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (United States)
5. Department of Physics and Astronomy, California State University, Los Angeles, California 90032 (United States)
6. Department of Physics, College of William and Mary, Williamsburg, Virginia 23185 (United States)

We measured the {sup 12}C(e,e{sup {prime}}p) cross section as a function of missing energy in parallel kinematics for (q,{omega})=(970 MeV/c, 330 MeV) and (990 MeV/c, 475 MeV). At {omega}=475 MeV, at the maximum of the quasielastic peak, there is a large continuum (E{sub m}{gt}50 MeV) cross section extending out to the deepest missing energy measured, amounting to almost 50{percent} of the measured cross section. The ratio of data to distorted-wave impulse approximation (DWIA) calculation is 0.4 for both {ital p} and {ital s} shells. At {omega}=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 {ital p} shell and 1.0 for the {ital s} shell. We infer that one or more mechanisms that increase with {omega} transform some of the single-nucleon knockouts into a multinucleon knockout, decreasing the valence knockout cross section and increasing the continuum cross section. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 289078
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 59; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 12 TARGET
CROSS SECTIONS
ELECTRON REACTIONS
KNOCK-OUT REACTIONS
MOMENTUM TRANSFER
NUCLEAR REACTIONS