Abstract.
The differential cross section was measured for the 12C(e,e’pp)10Be g.s. reaction at energy and momentum transfers of 163MeV and 198MeV/c, respectively. The measurement was performed at the Mainz Microtron by using two high-resolution magnetic spectrometers of the A1 Collaboration and a newly developed silicon detector telescope. The overall resolution of the detector system was sufficient to distinguish the ground state from the first excited state in 10 Be. We chose a super-parallel geometry that minimizes the effect of two-body currents and emphasizes the effect of nucleon-nucleon correlations. The obtained differential cross section is compared to the theoretical results of the Pavia reaction code in which different processes leading to two-nucleon knockout are accounted for microscopically. The comparison shows a strong sensitivity to nuclear-structure input and the measured cross section is seen to be dominated by the interplay between long- and short-range nucleon-nucleon correlations. Microscopic calculations based on the ab initio self-consistent Green’s function method give a reasonable description of the experimental cross section.
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A1 Collaboration., Makek, M., Achenbach, P. et al. Differential cross section measurement of the 12C(e,e’pp)10Beg.s. reaction. Eur. Phys. J. A 52, 298 (2016). https://doi.org/10.1140/epja/i2016-16298-3
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DOI: https://doi.org/10.1140/epja/i2016-16298-3