The present article is the second out of three on a study of the 40 Ca(e, e x) reaction discussing the multipole decomposition of the measured cross sections and the analysis of angular correlations. The decomposition of the strongly overlapping E0, E1 and E2 giant resonance strengths using the (e, e x; x = p, α) reaction in 40 Ca is discussed for excitation energies between 10 and about 21 MeV. Two extraction methods are presented based on the variation of the form factors for the different multipoles. The resulting B(E1) strength distribution is in good agreement with (γ, x) photoabsorption data. The summed B(E2) and B(E0) strength is highly fragmented and spread out over the energy region investigated. Microscopic continuum RPA calculations including the coupling of the basic particle-hole states to the low-lying surface vibrations are capable of reproducing the strength distributions quite accurately. Exhaustion of the energy-weighted sum rules (EWSR) for the various decay channels is presented.
A complete decomposition of E0, E1 and E2 contributions in 40 Ca is possible for (e, e α) angular correlations populating the 36 Ar ground state. Contrary to expectations, the form factors ✩ Work supported by the DFG under contract FOR 272/2-1 and through SFB 201.