Binding-energy independence of reduced spectroscopic strengths derived from (p,2p) and (p,pn) reactions with nitrogen and oxygen isotopes

Abstract

A campaign of intermediate energy (300-450 MeV/u) proton-induced nucleon\nknockout measurements in inverse kinematics has been recently undertaken at the\nR 3 B/LAND setup at GSI. We present a systematic theoretical analysis of these\ndata with the aim of studying the quenching of the single-particle strengths\nand its binding-energy dependence. For that, the measured semi-inclusive (p,\n2p) and (p, pn) cross sections are compared with theoretical predictions based\non single-particle cross sections derived from a novel coupled-channels\nformalism and shell-model spectroscopic factors. A systematic reduction of\nabout 20-30% is found, with a very limited dependence on proton-neutron\nasymmetry.\n