7Be breakup on heavy and light targets

Abstract

In this paper we present all-order quantum mechanical calculations of 7Be breakup on heavy (208Pb) and light (12C) targets. We examine the issues concerning the extraction of the astrophysical S-factor from the breakup data. We discuss the interplay between Coulomb and nuclear breakup, and the importance of higher-order couplings on the cross section. We show that nuclear and Coulomb contributions are not separable using the standard angular selection criterion as nuclear breakup remains large for small scattering angles, even for the heavy target. However, by selecting an upper limit on the relative energy between the final fragments, the contribution from the nuclear breakup can be significantly reduced such that Coulomb breakup is the main reaction mechanism. We show that the extraction of the asymptotic normalization coefficient may require more careful consideration of the nuclear interior than previously used.

5 pages, 8 figures

References in corpus (7)

• Solar Fusion Cross Sections
• Multi-step effects in subcoulomb breakup
• Solar Neutrino Constraints on the BBN Production of Li
• Electromagnetic Dissociation of 8B and the Rate of the 7Be(p,gamma)8B Reaction in the Sun
• Measurement of E2 Transitions in the Coulomb Dissociation of 8B
• Asymptotic normalization coefficient of ^{8}B from breakup reactions and the S_{17} astrophysical factor
• Study of the He3(He4,gamma)Be7 and H3(He4,gamma)Li7 reactions in an extended two-cluster model

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• Breakup dynamics of a neutron-halo projectile on heavy target at deep sub-barrier energies
• XCDCC: Core Excitation in the Breakup of Exotic Nuclei
• Impact of ${}^7$Be breakup on ${}^7$Li(p,n) Neutron Spectrum