Abstract
Cross sections for the He-3(e,e'pp)n reaction were measured over a wide range of energy and three-momentum transfer. At a momentum transfer q=375 MeV/c, data were taken at transferred energies omega ranging from 170 to 290 MeV. At omega = 220 MeV, measurements were performed at three q values (305, 375, and 445 MeV/c). The results are presented as a function of the neutron momentum in the final state, as a function of the energy and momentum transfer, and as a function of the relative momentum of the two-proton system. The data at neutron momenta below 100 MeV/c, obtained for two values of the momentum transfer at omega = 220 MeV, are well described by the results of continuum-Faddeev calculations. These calculations indicate that the cross section in this domain is dominated by direct two-proton emission induced by a one-body hadronic current. Cross section distributions determined as a function of the relative momentum of the two protons are fairly well reproduced by continuum-Faddeev calculations based on various realistic nucleon-nucleon potential models. At higher neutron momentum and at higher energy transfer, deviations between data and calculations are observed that may be due to contributions of isobar currents.
Original language | English |
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Number of pages | 13 |
Journal | PHYSICAL REVIEW C-NUCLEAR PHYSICS |
Volume | 63 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2001 |
Externally published | Yes |
Keywords
- Short-range correlations
- Final-state interaction
- Total cross-section
- Photon-absorption
- Multinucleon mechanisms
- Electron-scattering
- Exchange currents
- 2 protons
- He-3
- Photodisintegration