Precise data on the neutron magnetic form factor G mn have been obtained with measurements of the ratio of cross sections of D(e, e ′ n) and D(e, e ′ p) up to momentum transfers of Q 2 = 0.9 (GeV/c) 2 . Data with typical uncertainties of 1.5% are presented. These data allow for the first time to extract a precise value of the magnetic radius of the neutron.

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Abstract. The electric form factor of the neutron, GE,n, has been measured at the Mainz Microtron by recoil polarimetry in the quasielastic D( e, e ′ n)p reaction. Three data points have been extracted at squared four-momentum transfers Q 2 = 0.3, 0.6 and 0.8 (GeV/c) 2 . Corrections for nuclear binding effects have been applied. PACS. 13.40.Gp Electromagnetic form factors -14.20.Dh Protons and neutrons -13.88.+e Polarisation in interactions and scattering

The charge form factor of the neutron has been determined from asymmetries measured in quasi-elastic 3 − → He( e, e ′ n) at a momentum transfer of 0.67 (GeV/c) 2 . In addition, the target analyzing power, A o y , has been measured to study effects of final state interactions and meson exchange currents.