Quasielastic knockout of clusters from p-shell nuclei by 1 GeV protons: Spectroscopic amplitudes of virtually excited clusters and the eikonal approximation

A calculation technique of spectroscopic amplitudes of the lightest virtually excited clusters d, t, and α in p-shell nuclei is presented. These amplitudes are incorporated into a cluster quasielastic knockout theory based on the Glauber-Sitenko multiple scattering formalism where deexcitation of virtual clusters is taken into account and the outgoing cluster distorted wave is described by means of an eikonal approximation. Numerical calculations for a few target nuclei and knocked-out clusters complement our previous results and show that the strong influence of deexcitation effects is a general property of the reactions investigated. It is exemplified by angular anisotropy of the recoil momentum distributions, etc.