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

Abstract

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 ${(5/2)}^{\mathrm{\ensuremath{-}}}$ 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.