Year: 1999
Type: article
Abstract: We measured the ${}^{12}\mathrm{C}{(e,e}^{\ensuremath{'}}p)$ cross section as a function of missing energy in parallel kinematics for $(q,\ensuremath{\omega})=(970 \mathrm{MeV}/c, 330 \mathrm{MeV})$ and $(990 \mathrm{MeV}/c, 475 \mathrm{MeV}).$ At $\ensuremath{\omega}=475 \mathrm{MeV},$ at the maximum of the quasielastic peak, there is a large continuum ${(E}_{m}>50 \mathrm{MeV})$ cross section extending out to the deepest missing energy measured, amounting to almost 50% of the measured cross section. The ratio of data to distorted-wave impulse approximation (DWIA) calculation is 0.4 for both p and s shells. At $\ensuremath{\omega}=330 \mathrm{MeV},$ 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 $\ensuremath{\omega}$ transform some of the single-nucleon knockouts into a multinucleon knockout, decreasing the valence knockout cross section and increasing the continuum cross section.
Source: Physical Review C
Authors: J. H. Morrison, H. Baghaei, W. Bertozzi, S. Gilad, J. Glickman, C. E. Hyde-Wright, N. Kalantar-Nayestanaki, R. W. Lourie, S. Penn, P. E. Ulmer, L. B. Weinstein, 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, J. M. Finn, C. Perdrisat, V. Punjabi
Institution: Massachusetts Institute of Technology
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2155035953