Coupled-channels calculations of nonelastic cross sections using a density-functional structure model

Abstract

A microscopic calculation of the reaction cross-section for nucleon-nucleus scattering has been performed by explicitly coupling the elastic channel to all particle-hole (p-h) excitation states in the target and to all one-nucleon pickup channels. The p-h states may be regarded as doorway states through which the flux flows to more complicated configurations, and subsequently to long-lived compound nucleus resonances. Target excitations for 40,48Ca, 58Ni, 90Zr and 144Sm were described in a QRPA framework using a Skyrme functional. Reaction cross sections calculated in this approach were compared to predictions of a fitted optical potential and to experimental data, reaching very good agreement. Couplings between inelastic states were found to be negligible, while the couplings to pickup channels contribute significantly. For the first time observed reaction cross-sections are completely accounted for by explicit channel coupling, for incident energies between 10 and 40 MeV.

Accepted for publication on Physical Review Letters. Article is expected to be published in the November 12, 2010 issue. 4 pages, 4 figures

References in corpus (4)

• Self-Consistent Description of Multipole Strength in Exotic Nuclei I: Method
• Nucleon-nucleus optical potential in the particle-hole approach
• Excited-State Density Distributions of Neutron-Rich Unstable Nuclei
• The continuum description with pseudo-state wave functions

Cited by in corpus (12)

• Computational Nuclear Quantum Many-Body Problem: The UNEDF Project
• Microscopic positive-energy potential based on Gogny interaction
• Towards a Microscopic Reaction Description Based on Energy-Density-Functional Structure Models
• Derivation of an optical potential for statically deformed rare-earth nuclei from a global spherical potential
• Very low-energy nucleon + 16O coupled-channel scattering: results with a phenomenological vibrational model
• Status of reaction theory for studying rare isotopes
• Coupling between collective modes in the deformed ${}^{98}$Zr nucleus: Insights from consistent HFB+QRPA calculations with the Gogny interaction
• Improving nuclear data evaluations with predictive reaction theory and indirect measurements
• Reaction cross-section predictions for nucleon induced reactions
• Towards a Predictive HFB+QRPA Framework for Deformed Nuclei: Selected Tools and Technique
• Neutron capture cross sections of radioactive nuclei
• Microscopic optical potentials from a Greens function approach