Carbon-19 in Halo EFT: Effective-range parameters from Coulomb-dissociation experiments

Abstract

We study the Coulomb dissociation of the 19C nucleus in an effective field theory that uses the 18C core and the neutron as effective degrees of freedom and exploits the separation of scales in this halo system. We extract the effective-range parameters and the separation energy of the halo neutron from the experimental data taken at RIKEN by Nakamura et al. We obtain a value of (575 +/- 55(stat.) +/- 20(EFT)) keV for the one-neutron separation energy of 19C, and (7.75 +/- 0.35(stat.) +/- 0.3(EFT)) fm for the 18C-neutron scattering length. The width of the longitudinal momentum distribution predicted by EFT using this separation energy agrees well with the experimental data taken at NSCL by Bazin et al., reaffirming the dominance of the s-wave configuration of the valence neutron.

14 pages, 10 figures

References in corpus (8)

• One- and two-neutron removal reactions from the most neutron-rich carbon isotopes
• Universal properties and structure of halo nuclei
• Electromagnetic strength of neutron and proton single-particle halo nuclei
• Radiative Neutron Capture on Lithium-7
• Efimov states and their Fano resonances in a neutron-rich nucleus
• Radiative Neutron Capture on Carbon-14 in Effective Field Theory
• Resonance Contribution to Radiative Neutron Capture on Lithium-7
• Scaling laws and higher-order effects in Coulomb excitation of neutron halo nuclei

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• Efimov Physics: a review
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• Charge form factors of two-neutron halo nuclei in halo EFT
• Marrying {\it ab initio} calculations and Halo-EFT: the case of ${}^7\mathrm{Li}+n\to {}^8\mathrm{Li}+\gamma$
• Constraining Low-Energy Proton Capture on Beryllium-7 through Charge Radius Measurements
• Dissecting reaction calculations using Halo EFT and ab initio input
• Range corrections in Proton Halo Nuclei
• Three-body systems in physics of cold atoms and halo nuclei
• Electric structure of shallow D-wave states in Halo EFT
• Combining Halo-EFT descriptions of nuclei and precise models of nuclear reactions
• Final-state interactions and spin structure in $E1$ breakup of ${}^{1}1$Li in Halo EFT
• Electric Properties of One-Neutron Halo Nuclei in Halo EFT
• One- and two-neutron halos in effective field theory
• Halo EFT for ${}^{31}$Ne in a spherical formalism