Comparison of the {sup 12}C(e,e{sup '}p) cross section at low momentum transfer with a relativistic calculation
- Laboratory of Nuclear Science, Graduate School of Science, Tohoku University, Mikamine, Taihaku-ku, Sendai 982-0826 (Japan)
The (e,e{sup '}p{sub 0}) cross section of {sup 12}C has been measured at an energy transfer of 60 MeV and a momentum transfer of 104.4 MeV/c using a 197.5 MeV continuous electron beam. The cross section at missing momenta between 181.5 and 304.8 MeV/c obtained from the experiment is compared with theoretical calculations based on the relativistic distorted-wave impulse approximation with and without meson-exchange currents (MEC). The contribution of MEC due to the seagull current is large in the high-missing-momentum region, in particular for the longitudinal component. The cross sections calculated using three different current-conserving operators (cc1, cc2, and cc3) are similar, in contrast to the ({gamma},p) reaction, where the operators give very different results. The shape of the measured cross section is well described by the calculations, whereas its magnitude is slightly smaller than that described by the calculations.
- OSTI ID:
- 21296592
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 80, Issue 6; Other Information: DOI: 10.1103/PhysRevC.80.064601; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BOSON-EXCHANGE MODELS
CARBON 12 TARGET
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON BEAMS
ENERGY TRANSFER
IMPULSE APPROXIMATION
MEV RANGE 100-1000
MEV RANGE 10-100
MOMENTUM TRANSFER
PHOTONUCLEAR REACTIONS
PROTON-EMISSION DECAY
RELATIVISTIC RANGE