Measurement of the Neutron Magnetic Form Factor

The ratio of neutron and proton yields at quasifree kinematics was measured for the reactions ²H(e,e^'n) and ²H(e,e^'p) at momentum transfers Q²0ex0ex=0ex0ex0.125, 0.255, 0.417, and 0.605(GeV/c)², detecting the neutron and the proton simultaneously in the same scintillator array. The neutron detection efficiency was measured in situ with the ¹H(γ,π⁺)n reaction. From this the ratio R of ²H(e,e^'n) and ²H(e,e^'p) cross sections was determined and used to extract the neutron magnetic form factor GMⁿ in a model insensitive approach, resulting in an inaccuracy between 2.1% and 3.3% in GMⁿ.