Reaction cross sections in Si of light proton-halo candidates 12N and 17Ne

Abstract

Total reaction cross sections, σR, on Si were measured near 40 A MeV for the proton-halo candidate 12N and the two-proton-halo candidate 17Ne, and were compared with σR for other light proton-rich nuclei. The A-dependence shows enhanced σR's for 12N and 17Ne, relative to their neighbors, but the effect is smaller than for 8B which has been argued to have a proton halo. In general, nuclei with loosely bound last protons (Sp ⩽ 1.5 MeV) have significantly larger σR's than their neighbors. Cross sections for charge-removal from 12N and 17Ne also were obtained.