Core Transitions in the Breakup of Exotic Nuclei

Abstract

An interesting physical process has been unveiled: dynamical core excitation during a breakup reaction of loosely bound $core+N$ systems. These reactions are typically used to extract spectroscopic information and/or astrophysical information. A new method, the eXtended Continuum Discretized Coupled Channel (XCDCC) method, was developed to incorporate, in a consistent way and to all orders, core excitation in the bound and scattering states of the projectile, as well as dynamical excitation of the core as it interacts with the target. The model predicts cross sections to specific states of the core. It is applied to the breakup of ${}^{11}$Be on ${}^9$Be at 60 MeV/u, and the calculated cross sections are in improved agreement with the data. The distribution of the cross section amongst the various core states is shown to depend on the reaction model used, and not simply on the ground state spectroscopic factors.

arXiv comment5 pages, 1 figure, accepted Phys. Rev. C

References in corpus (6)

• Coulomb and nuclear breakup of a halo nucleus 11Be
• Multi-step effects in subcoulomb breakup
• Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels
• Gaussian expansion approach to Coulomb breakup
• Breakup of 8B and the S17 astrophysical factor revisited
• Sensitivity of 8B breakup cross section to projectile structure in CDCC calculations

Cited by in corpus (13)

• Fusion and Direct Reactions of Halo Nuclei at Energies around the Coulomb Barrier
• Coupled-channels effects in elastic scattering and near-barrier fusion induced by weakly bound nuclei and exotic halo nuclei
• Toward emulating nuclear reactions using eigenvector continuation
• Extracting (n,g) direct capture cross sections from Coulomb dissociation: application to ${}^{14}$C(n,$\gamma$)${}^{15}$C
• Core excitation in the elastic scattering and breakup of ${}^{11}$Be on protons
• The Onset of Nuclear Structure Effects in Near-Barrier Elastic Scattering of Weakly-Bound Nuclei: ${}^6$He and ${}^6$Li Compared
• B(E1) Strengths from Coulomb Excitation of 11Be
• Breakup reaction models for two- and three-cluster projectiles
• Role of core excitation in (d,p) transfer reactions
• Re-examining the transition into the N=20 island of inversion: structure of ${}^{30}$Mg
• Deducing spectroscopic factors from wave-function asymptotics
• Open issues in extracting nuclear structure information from the breakup of exotic nuclei
• XCDCC: Core Excitation in the Breakup of Exotic Nuclei