Polarized gas targets for electron scattering experiments
ABSTRACT Polarized gas targets represent a unique opportunity for the measurement of spin observables in electro-nuclear physics. The status in polarized target technique is briefly reviewed, which entails a discussion of atomic beam sources for 1H and 2H, and spin- and metastability-exchange sources for 3He. Attention is paid as much as possible to new developments. As a specific example, we discuss how the asymmetries for the reaction 3(,e′p) may provide precise information on the small mixed-symmetry S′ and the D-wave parts of the 3He ground-state wave function.