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Experimental studies of few-body systems at MAMI

  • M. O. DistlerEmail author
Review

Abstract

Few-body experiments at the Mainz Microtron were focused on a number of selected topics. Double-polarization experiments to determine the neutron electric form factor Gen have been performed using both deuterium and polarized helium-3 targets. The structure of 3He has been studied in the reactions 3H e⃗ e(ee,en) and 3H e⃗ e(ee,ep) with large (transversal) missing momenta and in quasi-elastic electron scattering. Electromagnetically induced two-nucleon knockout has been investigated in order to study the role of correlated nucleon-nucleon motion in the nucleus. Measurements of the (e,epn) reaction on 3He and 16O were performed for the first time. A triple-polarization experiment of type 3H e⃗ e(ee,e′e⃗p⃗)d has been performed, where, in addition, the spin of the knocked out proton is analyzed. This measurement provides information on the spin-dependent momentum distribution of proton-deuteron clusters in the 3He nucleus. Hence, by tagging the outgoing deuteron spin-polarized 3He might also serve as an effective polarized proton target for electron scattering experiments. Moreover, in inclusive 3,4He(e,e′) measurements at low momentum transfer, the effect of 3-body-forces has been studied.

Keywords

Form Factor European Physical Journal Special Topic Final State Interaction Electric Form Factor Meson Exchange Current 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences and Springer 2011

Authors and Affiliations

  1. 1.Institute for Nuclear PhysicsUniversity of MainzMainzGermany

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