Extended sudden approximation model for high-energy nucleon removal reactions

Abstract

A model based on the sudden approximation has been developed to describe high energy single nucleon removal reactions. Within this approach, which takes as its starting point the formalism of Hansen \cite{Anne2}, the nucleon-removal cross section and the full 3-dimensional momentum distributions of the core fragments including absorption, diffraction, Coulomb and nuclear-Coulomb interference amplitudes, have been calculated. The Coulomb breakup has been treated to all orders for the dipole interaction. The model has been compared to experimental data for a range of light, neutron-rich psd-shell nuclei. Good agreement was found for both the inclusive cross sections and momentum distributions. In the case of ${}^{17}$C, comparison is also made with the results of calculations using the transfer-to-the-continuum model. The calculated 3-dimensional momentum distributions exhibit longitudinal and transverse momentum components that are strongly coupled by the reaction for s-wave states, whilst no such effect is apparent for d-waves. Incomplete detection of transverse momenta arising fromlimited experimental acceptances thus leads to a narrowing of the longitudinal distributions for nuclei with significant s-wave valence neutron configurations, as confirmed by the data. Asymmetries in the longitudinal momentum distributions attributed to diffractive dissociation are also explored.

arXiv comment16 figures, submitted to Phys. Rev. C

References in corpus (6)

• Breakup reactions of the halo nuclei Be11 and B8
• One-neutron removal reactions on neutron-rich psd-shell nuclei
• One-neutron removal reactions on light neutron-rich nuclei
• Coulomb-Nuclear Coupling and Interference Effects in the Breakup of Halo Nuclei
• Initial State Dependence of the Breakup of Weakly Bound Carbon Isotopes
• Reaction models to probe the structure of light exotic nuclei

Cited by in corpus (6)

• Quenching of single-particle strength from direct reactions with stable and rare-isotope beams
• Single-Proton Removal Reaction Study of 16B
• Single-neutron knockout from ${}^{20}\text{C}$ and the structure of ${}^{19}\text{C}$
• Re-examining the transition into the N=20 island of inversion: structure of ${}^{30}$Mg
• Status of art of reaction models for projectiles far from stability
• Models of breakup: a final state interaction problem. In memory of Mahir Hussein