Abstract
General theory of transition charge and current densities is formulated for inelastic electron scattering. Single-particle densities are calculated. The many-fermion matrix element of a general one-body operator is derived for states of generalized seniority two. The Otsuka-Arima-Iachello mapping is performed to yield the M1 transition current of the interacting-boson approximation (IBA). Transition currents and DWBA form factors are computed for the strong 1 + excitations in 154Sm, 154–158Gd, 164Dy and 168Er. Particular emphasis is placed on 164Dy because of its rich experimental data. Boson g-factors are computed for these nuclei. All parameters are taken from the literature and not fitted to the scattering data. Particle-hole symmetry is discussed.
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