Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

Abstract

Twenty-one two-proton knockout ðp; 3pÞ cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the ðp; 3pÞ kinematics are consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of ðp; 3pÞ over ðp; 2pÞ inclusive cross sections follow the trend of other many-nucleon removal reactions, further reinforcing the sequential nature of ðp; 3pÞ in neutron-rich nuclei.

Ambiguities from Nuclear Interactions in the \(^{12}\)C(p,2p)\(^{11}\)B Reaction

“…In recent years, thanks to the latest technological improvements, (p, pN) experiments can be performed with unstable beam in inverse kinematics at several rare isotope beam (RIB) facilities [6][7][8][9][10][11][12][13]. These reactions have been applied to studying various problems from the quenching of nucleon SFs [6,10,14] to the evolution of single-particle structures in a wide variety of exotic nuclei from light [15][16][17] to medium ones [18][19][20][21].…”