Two-step processes in the quasi-free (e,e’p) reaction

The role of two-step processes in the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(e,e,’p${)}^{11}$B reaction has been investigated by studying the transition to the ${\mathrm{}(5/2)\mathrm{}}^{\mathrm{-}}$ state at $E_x$=4.45 MeV. In a (1s${)}^4$(1p${)}^8$ shell-model space this state cannot be excited by a one-step process, and a secondary process is therefore required. Such processes are found to be sufficiently small to enable the study of small wave-function components with the (e,e’p) reaction.