Cold neutrons trapped in external fields

Details Cold neutrons trapped in external fields Cold neutrons trapped in external fields

2010-10-21

arxiv.org/abs/1010.4583v2

Phys.Rev.Lett.106:012501,2011

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures, final version. Additional material reference added in the published version

Scientific paper

10.1103/PhysRevLett.106.012501

The properties of inhomogeneous neutron matter are crucial to the physics of neutron-rich nuclei and the crust of neutron stars. Advances in computational techniques now allow us to accurately determine the binding energies and densities of many neutrons interacting via realistic microscopic interactions and confined in external fields. We perform calculations for different external fields and across several shells to place important constraints on inhomogeneous neutron matter, and hence the large isospin limit of the nuclear energy density functionals that are used to predict properties of heavy nuclei and neutron star crusts. We find important differences between microscopic calculations and current density functionals; in particular the isovector gradient terms are significantly more repulsive than in traditional models, and the spin-orbit and pairing forces are comparatively weaker.

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