Neutron Transfer Studied with a Radioactive beam of 24Ne, using TIARA at SPIRAL

TL;DR

This paper introduces a high-resolution experimental technique using radioactive beams to study neutron transfer reactions, presenting initial results from the 24Ne(d,p)25Ne reaction that reveal changes in neutron shell structure in neutron-rich nuclei.

Contribution

It presents a new experimental approach with the TIARA array for studying nucleon transfer reactions using radioactive beams, demonstrating its effectiveness with initial physics results.

Findings

Evidence for the emergence of the N=16 neutron magic number.

Disappearance of the N=20 neutron magic number in very neutron-rich neon isotopes.

Successful application of the technique to inverse kinematics reactions.

Abstract

A general experimental technique for high resolution studies of nucleon transfer reactions using radioactive beams is briefly described, together with the first new physics results that have been obtained with the new TIARA array. These first results from TIARA are for the reaction 24Ne(d,p)25Ne, studied in inverse kinematics with a pure radioactive beam of 100,000 pps from the SPIRAL facility at GANIL. The reaction probes the energies of neutron orbitals relevant to very neutron rich nuclei in this mass region and the results highlight the emergence of the N=16 magic number for neutrons and the associated disappearance of the N=20 neutron magic number for the very neutron rich neon isotopes.