From Halo Effective Field Theory to the study of breakup and transfer reactions: reliably probing the halo structure of 11Be and 15C

L Moschini,P Capel,J Yang

doi:10.1088/1742-6596/1610/1/012010

Abstract

In this work we study one-neutron halo nuclei, and in particular 11Be and 15C, which can be seen as an inert core of 10Be or 14C plus a loosely bound neutron. During the last decades several transfer and breakup reactions involving these systems have been measured on different targets and energies. We study these processes using one single structure model for each nucleus applying the halo effective field theory (Halo EFT) at next-to-leading order NLO. The main parameters of this EFT are adjusted on nuclear-structure data and/or ab initio predictions. We model the transfer reaction within the Adiabatic Distorted Wave Approximation (ADWA) and the breakup process applying an eikonal model with a consistent treatment of nuclear and Coulomb interactions at all orders. At high energy, our model includes a proper treatment of special relativity Our theoretical calculations are in good agreement with experiment for a variety of reaction observables, thus assessing the robustness of the structure model provided for these nuclei. This new idea enables us also to reliably estimate the nuclear-structure observables that actually affect the reaction process, and hence that can be inferred from such measurements.

Highlights

In this work we study reactions involving one-neutron halo nuclei
Our model includes a proper treatment of special relativity Our theoretical calculations are in good agreement with experiment for a variety of reaction observables, assessing the robustness of the structure model provided for these nuclei
We find that our theoretical predictions are in good agreement with the experimental data for each reaction at different energies, assessing the robustness of the structure model provided for these nuclei

Summary

Introduction

These exotic nuclei are found close to the neutron drip-line and exhibit a much larger matter radius than their isobars This peculiar property is qualitatively understood as due to their low binding energy of one neutron, which can tunnel far into the classically forbidden region and form like a diffuse halo around a compact core [1, 2]. Examples of these systems are 11Be and 15C, which can be seen as an inert core of 10Be or 14C plus a neutron. We study transfer and breakup processes at different energies and compare our predictions with experimental results

The structure model

Conclusions