Two-neutron overlap functions for 6He from a microscopic structure model

Abstract

A fully antisymmetrized microscopic model is developed for light two-neutron halo nuclei using a hyper-spherical basis to describe halo regions. The many-body wavefunction is optimized variationally. The model is applied to 6He bound by semi realistic Minnesota nucleon-nucleon forces. The two-neutron separation energy and the radius of the halo are reproduced in agreement with experiment. Antisymmetrization effects between 4He and halo neutrons are found to be crucial for binding of 6He. We also properly extract two-neutron overlap functions and find that there is a significant increase of 30%-70% in their normalization due to microscopic effects as compared to the results of three-body models.

To be published in Nucl. Phys. A

References in corpus (2)

• Recent developments in no-core shell-model calculations
• Effects of deformation in the three-body structure of 11Li

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• Comparison of 120Sn(6He,6He)120Sn and 120Sn(alpha,alpha)120Sn elastic scattering and signatures of the 6He neutron halo in the optical potential
• Three-cluster dynamics within the ab initio no-core shell model with continuum: How many-body correlations and $\alpha$-clustering shape ${}^6$He
• Three-cluster dynamics within an ab initio framework
• Two-neutron transfer reaction mechanisms in ${}^{12}$C(${}^6$He,${}^4$He)${}^{14}$C using a realistic three-body ${}^6$He model
• Microscopic description of translationally-invariant core+N+N overlap functions
• The nuclear electric polarizability of 6He
• Deducing spectroscopic factors from wave-function asymptotics
• Calculation Of The Elastic P6He And P8He Scattering In Glauber Approximation
• Electromagnetic Observables in Few-Nucleon Systems