Quasielastic reaction mechanism studied using the reaction <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>(e,e’p)

L. B. Weinstein; H. Baghaei; W. Bertozzi; J. M. Finn; J. Glickman; C. E. Hyde-Wright; N. Kalantar-Nayestanaki; R. W. Lourie; J. A. Nelson; W. W. Sapp; C. P. Sargent; P. E. Ulmer; B. H. Cottman; L. Ghedira; E. J. Winhold; J. R. Calarco; J. Wise; P. Boberg; C. C. Chang; D. Zhang; K. Aniol; M. B. Epstein; D. J. Margaziotis; C. Perdrisat; V. Punjabi

doi:10.1103/PhysRevLett.64.1646

Quasielastic reaction mechanism studied using the reaction ${}^{12}C$ (e,e’p)

L. B. Weinstein, H. Baghaei, W. Bertozzi, J. M. Finn, J. Glickman, C. E. Hyde-Wright, N. Kalantar-Nayestanaki, R. W. Lourie, J. A. Nelson, W. W. Sapp, C. P. Sargent, P. E. Ulmer, B. H. Cottman, L. Ghedira, E. J. Winhold, J. R. Calarco, J. Wise, P. Boberg, C. C. Chang, D. Zhang, K. Aniol, M. B. Epstein, D. J. Margaziotis, C. Perdrisat, and V. Punjabi

Phys. Rev. Lett. 64, 1646 – Published 2 April 1990

Abstract

We have measured missing-energy spectra for the reaction ${}^{12}C$ (e,e’p) in the quasielastic region in parallel kinematics at momentum transfers q of 585, 775, and 827 MeV/c. We observed ${}^{1}$ p and ${}^{1}$ s single-proton knockout peaks and large broad strength attributed to multinucleon knockout. We saw no increase in strength at pion threshold. The ratio of single-particle knockout to a distorted-wave impulse-approximation calculation is approximately constant with q. Multinucleon knockout is 25%–40% of the total cross section; it increases with q. This quasielastic non-single-nucleon knockout is much stronger than previously observed.

Received 28 September 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.1646

Authors & Affiliations

L. B. Weinstein, H. Baghaei, W. Bertozzi, J. M. Finn, J. Glickman, C. E. Hyde-Wright, N. Kalantar-Nayestanaki, R. W. Lourie, J. A. Nelson, W. W. Sapp, C. P. Sargent, P. E. Ulmer, B. H. Cottman, L. Ghedira, E. J. Winhold, J. R. Calarco, J. Wise, P. Boberg, C. C. Chang, D. Zhang, K. Aniol, M. B. Epstein, D. J. Margaziotis, C. Perdrisat, and V. Punjabi

Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181
Department of Physics, University of New Hampshire, Durham, New Hampshire 03824
Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
Department of Physics Astronomy, California State University, Los Angeles, California 90032
Department of Physics, College of William and Mary, Williamsburg, Virginia 23185