Scaling and Interference in the Dissociation of Halo Nuclei

Abstract

The dissociation of halo nuclei through their collision with light and heavy targets is considered within the Continuum Discretized Coupled Channels theory. We study the one-proton halo nucleus ${}^8$B and the one-neutron halo nucleus ${}^{11}$Be, as well as the more normal ${}^7$Be. The procedure previously employed to extract the Coulomb dissociation cross section by subtracting the nuclear one is critically assessed, and the scaling law usually assumed for the target mass dependence of the nuclear breakup cross section is also tested. It is found that the nuclear breakup cross section for these very loosely bound nuclei does indeed behave as $a+b{A}^{1/3}$. However, it does not have the geometrically inspired form of a circular ring which seems to be the case for normal nuclei such as ${}^7$Be. We find further that we cannot ignore Coulomb-nuclear interference effects, which may be constructive or destructive in nature, and so the errors in previously extracted B(E1) using the subtraction procedure are almost certainly underestimated.

arXiv commentversion submitted to PRL + minor text changes

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Cited by in corpus (21)

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• Extracting (n,g) direct capture cross sections from Coulomb dissociation: application to ${}^{14}$C(n,$\gamma$)${}^{15}$C
• B(E1) Strengths from Coulomb Excitation of 11Be
• Determining $B(E1)$ distributions of weakly bound nuclei from breakup cross sections using Continuum Discretized Coupled Channels calculations. Application to ${}^{11}$Be
• The interplay of nuclear and Coulomb effects in proton breakup from exotic nuclei
• Effective radii of deuteron induced reactions
• Coulomb excitation of unstable nuclei at intermediate energies
• The ratio method: a new tool to study one-neutron halo nuclei
• Coulomb and nuclear effects in breakup and reaction cross sections
• Extracting electric dipole breakup cross section of one-neutron halo nuclei from breakup observables
• Scaling laws for near barrier Coulomb and Nuclear Breakup
• On the measurement of B(E2, 0+ -> 2+) using intermediate-energy Coulomb excitation
• Theoretical study of the elastic breakup of weakly bound nuclei at near barrier energies
• Combining Halo-EFT descriptions of nuclei and precise models of nuclear reactions
• Coulomb-nuclear dynamics in the weakly-bound 8Li breakup
• Exit Doorway Model for Nuclear Breakup of Weakly Bound Projectiles
• Properties of nuclear and Coulomb breakup of 8B
• Deformation, halo, and bubble structure: A paradigm shift of exotic phenomena in light to medium mass nuclei
• Study of Cluster Structures in Nuclei through the Ratio Method. A Tribute to Mahir Hussein