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Differential cross section measurement of the 12C(e,e’pp)10Beg.s. reaction

Makek, M, Achenbach, P, Ayerbe Gayoso, C, Barbieri, C, Bernauer, JC, Bohm, R, Bosnar, D, Denig, A, Distler, MO, Friscic, I , Giusti, C, Merkel, H, Muller, U, Nungesser, L, Pochodzalla, J, Sanches Majos, S, Schlimme, BS, Schwamb, M and Walcher, T (2016) Differential cross section measurement of the 12C(e,e’pp)10Beg.s. reaction European Physical Journal A: Hadrons and Nuclei, 52.

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The differential cross section was measured for the 12C(e,e’pp)10Beg.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.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Makek, M
Achenbach, P
Ayerbe Gayoso, C
Barbieri, C
Bernauer, JC
Bohm, R
Bosnar, D
Denig, A
Distler, MO
Friscic, I
Giusti, C
Merkel, H
Muller, U
Nungesser, L
Pochodzalla, J
Sanches Majos, S
Schlimme, BS
Schwamb, M
Walcher, T
Date : 27 September 2016
DOI : 10.1140/epja/i2016-16298-3
Copyright Disclaimer : The final publication is available at Springer via
Depositing User : Symplectic Elements
Date Deposited : 24 Oct 2016 14:24
Last Modified : 27 Sep 2017 02:08

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