Mechanisms in knockout reactions

Abstract

We report on the first detailed study of the mechanisms involved in knockout reactions, via a coincidence measurement of the residue and fast proton in one-proton knockout reactions, using the S800 spectrograph in combination with the HiRA detector array at the NSCL. Results on the reactions ${}^9$Be(${}^9$C,${}^8$B+X)Y and ${}^9$Be(${}^8$B,${}^7$Be+X)Y are presented. They are compared with theoretical predictions for both the diffraction and stripping reaction mechanisms, as calculated in the eikonal model. The data shows a clear distinction between the two reaction mechanisms, and the observed respective proportions are very well reproduced by the reaction theory. This agreement supports the results of knockout reaction analyses and their applications to the spectroscopy of rare isotopes.

References in corpus (2)

• Coulomb and nuclear breakup of a halo nucleus 11Be
• Calculations of three-body observables in ^8B breakup

Cited by in corpus (13)

• Systematics of intermediate-energy single-nucleon removal cross sections
• Quenching of single-particle strength from direct reactions with stable and rare-isotope beams
• One- and two-neutron removal reactions from the most neutron-rich carbon isotopes
• Recent developments for the optical model of nuclei
• Updated systematics of intermediate-energy single-nucleon removal cross sections
• Asymmetry of the parallel momentum distribution of (p,pN) reaction residues
• Nuclear Spectroscopy with Heavy Ion Nucleon Knockout and (p,2p) Reactions
• Elastic breakup cross sections of well-bound nucleons
• Probing elastic and inelastic breakup contributions to intermediate-energy two-proton removal reactions
• Benchmarking Faddeev and transfer-to-the-continuum calculations for (p, pN ) reactions
• Single-proton removal reaction in the IQMD+GEMINI model benchmarked by elemental fragmentation cross sections of ${}^{29-33}\mathrm{Si}$ on carbon at $\sim$230~MeV/nucleon
• Microscopic two-nucleon overlaps and knockout reactions from ${}^{12}$C
• Mirror nucleon-transfer reactions from ${}^{18}$Ne and ${}^{18}$O